Biology and Human Behavior: The Neurological Origins of Individuality, 2nd Edition

Course No. 1597
Professor Robert Sapolsky, Ph.D.
Stanford University
Share This Course
4.9 out of 5
129 Reviews
86% of reviewers would recommend this product
Course No. 1597
Streaming Included Free

Course Overview

When are we responsible for our own actions, and when are we in the grip of biological forces beyond our control? This intriguing question is the scientific province of behavioral biology, a field that explores interactions among the brain, mind, body, and environment that have a surprising influence on how we behave—from the people we fall in love with, to the intensity of our spiritual lives, to the degree of our aggressive impulses. In short, it is the study of how our brains make us the individuals that we are.

Biology and Human Behavior: The Neurological Origins of Individuality, 2nd Edition, is an interdisciplinary approach to this fascinating subject. In 24 lectures, you will investigate how the human brain is sculpted by evolution, constrained or freed by genes, shaped by early experience, modulated by hormones, and otherwise influenced to produce a wide range of behaviors, some of them abnormal. You will see that little can be explained by thinking about any one of these factors alone because some combination of influences is almost always at work.

Intense, Dynamic, and Entertaining

This course is a newly recorded and much-expanded update of Professor Robert Sapolsky's original Teaching Company course introduced in 1998, which was lauded as "extremely stimulating" by The American Biology Teacher.

A prominent neurobiologist, zoologist, and MacArthur "genius" grant recipient, Professor Sapolsky is a spellbinding lecturer who is also very entertaining. In a feature story in The New York Times, he was compared to a cross between renowned primatologist Jane Goodall and a borscht belt comedian. An article in the alumni magazine at Stanford University, where he teaches, called him "a man who exudes adrenaline and has a reservoir of intensity deep enough to spin the turbines at Hoover Dam."

What You Will Learn

The course opens with an introductory lecture and then proceeds to Modules I and II, which start at the level of how a single neuron works. You build upward to examine how millions of neurons in a particular region of the brain operate. The focus is on the regions of the brain most pertinent to emotion and behavior.

Modules III, IV, and V explore how the brain and behavior are regulated. First, you cover how the brain regulates hormones and how hormones influence brain function and behavior. Next you examine how both the brain and behavior evolved, covering contemporary thinking about how natural selection has sculpted and optimized behavior and how that optimization is mediated by brain function. Then you focus on a bridge between evolution and the brain, investigating what genes at the molecular level have to do with brain function and how those genes have evolved.

Module VI examines ethology, which is the study of the behavior of animals in their natural habitats. The focus in these lectures is on how hormones, evolution, genes, and behavior are extremely sensitive to environment.

Finally, Module VII explores how the various approaches—neurobiology, neuroendocrinology, evolution, genetics, and ethology—help explain an actual set of behaviors, with a particular focus on aggression. The final lecture summarizes what is known about the biology of human behavior and probes the societal implications of having such knowledge.

Insight into Yourself and Others

As you work through this thought-provoking and engaging material, you will learn much about your own behavior, not to mention that of others. One particularly intriguing region of the brain relating to behavior is the frontal cortex, which plays a central role in decision-making, gratification postponement, and other important functions. The frontal cortex is the part of the brain that "makes you do the harder thing," whether it is concentrating on an unwelcome task, keeping anger under control, or telling a white lie about a spouse's new haircut. Consider these cases:

  • What happens when there is essentially no frontal cortex?: Railroad worker Phineas Gage suffered a massive frontal cortical lesion in a serious accident in the 1840s. Overnight, he changed from a sober, conscientious worker to a profane, aggressive, socially inappropriate man who could never regularly work again. The loss of his frontal cortex meant he lost his emotional regulation; he had no means to do the "harder thing."
  • What happens when the frontal cortex is "offline"?: During rapid eye movement (REM) sleep, the frontal cortex goes offline, which explains why dreams are often wild and unrepressed—why dreams are dreamlike. People don't dream about balancing a checkbook. They dream about dancing in musicals or floating in the air.
  • What happens when the frontal cortex is immature?: One of the great myths is that the brain is completely wired up and matured at a very early stage. However, the frontal cortex is not fully functional until an individual is about a quarter-century old—a fact that explains a lot of fraternity behavior, notes Professor Sapolsky. With this in mind, it's worth asking if a 16-year-old violent criminal is not, by definition, organically impaired in frontal cortical function.

Myths that Die Hard

The myth of the fully wired, mature young brain is one of the often-heard pieces of misinformation that this course corrects. Other areas where Professor Sapolsky revises widely held beliefs include:

  • "For the good of the species": The old notion of group selection has been proven wildly incorrect. This is the idea that animals behave "for the good of the species" and that behaviors are driven by ways to increase the likelihood of the species surviving and multiplying. Evolution is not about animals behaving for the good of the species but, rather, behaving to optimize the number of copies of their own genes to pass on to the next generation.
  • The inevitability of social structures: Professor Sapolsky's own fieldwork in Africa has shown that an archetypal male-dominated, aggressive society of baboons can change radically to a tradition of low aggression within a single generation. "If these guys are freed from the central casting roles for them in the anthropology textbooks, we as a species have no excuse to say we have inevitable social structures," he says.

Cause for Concern and Hope

At the end of the course, Professor Sapolsky explores the implications of our emerging understanding of the origins of individual differences. How much do these insights threaten our own sense of self and individuality? Where do we draw the line between the essence of the person and the biological abnormalities? What counts as being ill? Who is biologically impaired, and who is just different? As more and more subtle abnormalities of neurobiology are understood, how much should we worry about the temptation to label people as "abnormal"? And what happens when we each have a few of these labels?

These and other questions should concern us all. But while Professor Sapolsky sees alarming trends, he also sees cause for hope. We needn't worry that we are on the verge of unmasking the secret behind everything we do, he says, since we can never explain everything; every answer opens up a dozen new questions. Furthermore, to explain something is not to destroy the capacity to be moved by it. "In the end," says Professor Sapolsky, "the purpose of science is not to cure us of our sense of mystery and wonder but to constantly reinvent and reinvigorate it."

Hide Full Description
24 lectures
 |  Average 30 minutes each
  • 1
    Biology and Behavior—An Introduction
    Professor Robert Sapolsky outlines the course, emphasizing that there is a neurobiology to who we are; it is vital that we learn about it; and it can be understood best through the interdisciplinary approach of this course. x
  • 2
    The Basic Cells of the Nervous System
    You begin a trio of lectures on the neurobiology of behavior at the cellular level. An overview of how a single neuron works explores the difference between the neuron's quiescent state, or resting potential, and its excited state, or action potential. x
  • 3
    How Two Neurons Communicate
    In this lecture you expand your study of neurons to see how two neurons communicate through the use of neurotransmitters—chemical messengers in the brain—and you examine the effects of certain drugs on the brain and on the neurological origins of individuality. x
  • 4
    Learning and Synaptic Plasticity
    This lecture describes how communication between neurons changes as a result of experience. The focus is on long-term potentiation (LTP) and how the process occurs in the hippocampus, with implications for learning and memory; and in the amygdala, with implications for fear and anxiety. x
  • 5
    The Dynamics of Interacting Neurons
    Expanding beyond the scale of the cell, you begin a three-lecture survey of the systems level. In this lecture you look at how neurons sharpen detection signals through inhibition and how layers of neurons that overlap and form networks affect individual memory, pain, and creativity. x
  • 6
    The Limbic System
    You investigate how subregions of the brain made of millions of neurons function. The focus is on the limbic system, which is most centrally involved in emotion and in generating emotional behavior. The limbic system will be central to the rest of the course. x
  • 7
    The Autonomic Nervous System (ANS)
    Professor Sapolsky examines how the limbic system regulates the function of the body by way of the autonomic nervous system and its subparts: the sympathetic nervous system and the parasympathetic nervous system. x
  • 8
    The Regulation of Hormones by the Brain
    The first of two lectures on hormones and behavior examines how the limbic system regulates the body through the release of many types of hormones. You review the nature of this regulation and the basic ways hormones work. x
  • 9
    The Regulation of the Brain by Hormones
    This lecture considers the converse of the brain's regulation of hormones, namely, the hormones' regulation of the brain. How can hormones change the function and even the very structure of the brain? A key point of this and the preceding lecture is to refute the view that hormones "cause" behaviors. x
  • 10
    The Evolution of Behavior
    The first of three lectures on the evolution of the brain and behavior reviews the mechanisms of evolution and then looks at the ways species can maximize through behavioral means the number of copies of their genes passed on to the next generation. x
  • 11
    The Evolution of Behavior—Some Examples
    You investigate how the evolution of behavior helps explain, and even predict, social behavior in numerous species that vary in how aggressive they are, whether they are monogamous or polygamous, and whether males participate in childcare, among other traits. x
  • 12
    Cooperation, Competition, and Neuroeconomics
    You review the evolution of competition and how the brain functions under different settings of competition. The formal analysis of such behavior, called game theory, is introduced and framed in both the context of the evolution of such strategizing and the sort of brains that can accomplish it. x
  • 13
    What Do Genes Do? Microevolution of Genes
    In this first of four lectures on the role of genes in sculpting behavior, you examine what a gene is and does. The main intellectual thrust of this module is to demonstrate the futility of the nature-versus-nurture debate when considering genes and the brain. x
  • 14
    What Do Genes Do? Macroevolution of Genes
    Evolution can be formally defined as changes in the function and distribution of genes in populations over time. But what exactly evolves in a gene on the molecular level? This lecture reviews what mutations are on that level and how they can affect behavior. x
  • 15
    Behavior Genetics
    How can you tell when a behavior has a genetic component? This lecture introduces the field of behavior genetics, which seeks to determine the extent that genes explain qualities such as intelligence, aggression, or introversion/extroversion. x
  • 16
    Behavior Genetics and Prenatal Environment
    The basic premise of behavior genetics is that when research controls for environment it can reveal the effects of genes. This lecture shows that this is virtually impossible to do because genes and environment interact constantly, particularly in the realm of behavior. The lecture also explores the results of environmental effects on fetuses. x
  • 17
    An Introduction to Ethology
    This is the first of two lectures on ethology, the study of animals in their natural habitat, and insights about the human brain and behavior that can be gleaned from it. Here, Professor Sapolsky gives an overview of ethology, a discipline that developed to counter behaviorist psychology. x
  • 18
    This lecture explores neuroethology, the study of the neural mechanisms mediating the naturalistic behavior of animals. In particular, you look at how the functioning of the limbic system varies among species and how the human limbic system can be understood in that context. x
  • 19
    The Neurobiology of Aggression I
    The final module of the course applies the previous lessons to the study of aggression. In this lecture you explore the neural bases of aggression—first the neurochemistry of aggressive behavior, then its neuroanatomy, emphasizing the limbic system and the frontal cortex. x
  • 20
    The Neurobiology of Aggression II
    This lecture poses two questions: What environmental events can trigger the limbic system to exert aggressive behavior seconds to minutes later? And how do hormones modulate the sensitivity of the brain to those environmental triggers? You focus on the hormone testosterone. x
  • 21
    Hormones and Aggression
    The first part of this lecture explores how patterns of hormone exposure around the time of birth can influence adult patterns of aggression. The second part examines how genes may influence the neurobiology of aggression but never outside the context of strong environmental interactions. x
  • 22
    Early Experience and Aggression
    You look at the role of environmental factors in aggression occurring days to decades later. In particular, you examine the effect of reward and punishment, early experience and social learning, and the ways those experiences can shape the development of relevant parts of the brain. x
  • 23
    Evolution, Aggression, and Cooperation
    The final lecture in this module looks at the evolution of aggression, examining which evolutionary factors promote aggressive behavior and how evolutionary biology gives scientists insights into ways that aggression might be contained. x
  • 24
    A Summary
    How much do insights into the neurobiology of human behaviors threaten a person's sense of self and individuality? Professor Sapolsky summarizes what science has learned about the neurobiology of individual differences, stressing the profound implications of this knowledge. x

Lecture Titles

Clone Content from Your Professor tab

What's Included

What Does Each Format Include?

Video DVD
Instant Video Includes:
  • Download 24 video lectures to your computer or mobile app
  • Downloadable PDF of the course guidebook
  • FREE video streaming of the course from our website and mobile apps
Video DVD
Instant Audio Includes:
  • Download 24 audio lectures to your computer or mobile app
  • Downloadable PDF of the course guidebook
  • FREE audio streaming of the course from our website and mobile apps
Video DVD
DVD Includes:
  • 24 lectures on 4 DVDs
  • 160-page printed course guidebook
  • Downloadable PDF of the course guidebook
  • FREE video streaming of the course from our website and mobile apps

What Does The Course Guidebook Include?

Video DVD
Course Guidebook Details:
  • 160-page printed course guidebook
  • Charts & diagrams
  • Suggested readings
  • Questions to consider

Enjoy This Course On-the-Go with Our Mobile Apps!*

  • App store App store iPhone + iPad
  • Google Play Google Play Android Devices
  • Kindle Fire Kindle Fire Kindle Fire Tablet + Firephone
*Courses can be streamed from anywhere you have an internet connection. Standard carrier data rates may apply in areas that do not have wifi connections pursuant to your carrier contract.

Your professor

Robert Sapolsky

About Your Professor

Robert Sapolsky, Ph.D.
Stanford University
Dr. Robert Sapolsky is John A. and Cynthia Fry Gunn Professor of Biological Sciences at Stanford University and Professor of Neurology and Neurosurgery in Stanford's School of Medicine. Professor Sapolsky earned his A.B. summa cum laude in Biological Anthropology from Harvard University and his Ph.D. in Neuroendocrinology from The Rockefeller University in New York. He is also a research associate at the Institute of...
Learn More About This Professor
Also By This Professor


Biology and Human Behavior: The Neurological Origins of Individuality, 2nd Edition is rated 4.8 out of 5 by 128.
Rated 5 out of 5 by from Wit and Insight The lecturer is so clear that you can listen to this only on audio and not miss much. He infuses his topic with wit and humor, so the journey through complex material is pleasant and engaging.
Date published: 2020-11-18
Rated 5 out of 5 by from Biology and Human Behavior As a professor of over 40 years at a major university, I can appreciate the excellence of this course. This professor is knowledgeable, organized, thorough, and concise. I loved the fast pace and bringing in so many fields of study to cover this complex topic. This is one of the best courses I have taken out of over 20 of the great courses that I have watched. Kudos!
Date published: 2020-05-05
Rated 5 out of 5 by from Raving reviews totally in place I don’t have much to add to the raving reviews this course has deservedly received. I fully agree with PurpleProf’s wonderful review, and I especially want to emphasize what a pleasure it was to listen this professor’s presentation: it is clear, beautifully structured and at times - downright hilarious. I fully intend to hear all of the other courses he has produced for TGC. A fascinating and enjoyable course.
Date published: 2020-03-14
Rated 5 out of 5 by from Complex but understandable I have watched 4 of the lectures and admittedly have a background in behavioral science, but these lectures are great and I wish everyone had access to this information.
Date published: 2019-08-25
Rated 5 out of 5 by from Outstanding Great materiel, really enjoyed the pace of the presentation the humor and the breadth of knowledge. Easily a top 10 of the great courses I’ve audited.
Date published: 2019-04-14
Rated 5 out of 5 by from A thorough analysis Professor Sapolsky examines human behavior form the points of view of geneticists, neuroscientists, psychologists, anthropologists, primatologists and others, to give a thorough explanation of why humans do what they do. He then uses the last four lectures for an analysis of aggression, integrating these different points of view. Each half hour is packed with information. Not a minute is wasted. The course is well worth the money and the time the user invests.
Date published: 2019-02-08
Rated 5 out of 5 by from Great course, great value! I really enjoyed this course. I listened to it at the gym and it made my workout seem to go much faster. However, this is one course where my concentration on what was being said really interfered with counting reps on the machines (or vice versa). It was a very good summary of what is known today about the way the brain influences our behavior from a biological point of view. Every single lecture was engaging. The professor made a complicated topic easy to understand. I understand computer circuits, which interestingly helped me understand some of what was being said in the audio version. It also helped that I had previously taken “The Learning Brain” and “Behavioral Economics: When Psychology and Economics Collide” which touched upon some of the topics and terms at a higher level. However, I don’t think I could ever pass a test where I had to point out things on a graphic or even spell key terms correctly. I am also sure I will have a better understanding of the details when I get around to reading the guidebook. Thus, I think the video version will be more beneficial for most people.
Date published: 2018-09-12
Rated 5 out of 5 by from Excellent presentation, with caveats I found Prof Sapolsky’s presentation style to be exceptionally engaging. He is enthusiastic, funny, and highly organized. He even made topics in specific lectures interesting, though I had expected to skip these lectures based only on the titles. He did an excellent job showing the complexities involved when exploring the biology of human behavior, taking into consideration a myriad of factors that may come into play. From lecture to lecture, he made a point of noting what we already covered, what we were about to cover in the current lecture, and where the future lectures were headed. This was very helpful given the volume of material that he covered. I have never taken a course about the brain, and my last course in biology was in 10th grade, approximately 50 years ago. This course was very informative and reasonably easy to understand, mostly because of the excellent presentation style. Since course reviews submitted by others were from 8 years ago, I assume that the course is at least 8 year old. Given the amount of research done in the area of biology of human behavior, I would have hoped for an updated version of the course that would reflect recent discoveries. On the negative side, when Prof Sapolsky cited specific examples of human behavior, as he did throughout the course, he then immediately proceeded to state the cause of those behaviors. He would say something like “what’s this all about?”, and then give his interpretation. Given the complexity behind human behavior which Prof Sapolsky himself communicated, It seems unlikely to me that there is only one reason for the behavior in each example cited, or that Prof Sapolsky has the unique ability to know the exact cause in each case. I believe it’s much more likely that Prof Sapolsky has theories about the causes of human behavior in the examples he cited, but he doesn’t consider the possibility of other interpretations. Also, I found it surprising that although he acknowledged the potential impact of the environment on human behavior, he never acknowledged that an individual’s thought (as opposed to physical brain activity) might influence or cause human behavior. I believe this is a significant oversight.
Date published: 2018-08-21
  • y_2020, m_11, d_26, h_16
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_18, tr_110
  • loc_en_US, sid_1597, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_teachco
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 12.08ms

Questions & Answers

Customers Who Bought This Course Also Bought

Buy together as a Set
Save Up To $20.05
Choose a Set Format