Top 200 Robert M. Sapolsky Quotes (2026 Update)
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151. “What the data show: the fewer social relationships a person has, the shorter his or her life expectancy, and the worse the impact of various infectious diseases. Relationships that are medically protective can take the form of marriage, contact with friends and extended family, church membership, or other group affiliations.”

— Robert M. Sapolsky

152. “Thus, particularly important is a 2011 study that used transcranial magnetic stimulation techniques to temporarily inactivate the vmPFC; subjects became less likely to change their answer to conform.”

— Robert M. Sapolsky

153. “This context dependency means that rather than causing X, testosterone amplifies the power of something else to cause X.”

— Robert M. Sapolsky

154. “Neuropsychologists are coming to recognize that there is a specialized subset of long-term memory. Remote memories are ones stretching back to your childhood – the name of your village, your native language, the smell of your grandmother’s baking. They appear to be stored in some sort of archival way in your brain separate from more recent long-term memories. Often, in patients with a dementia that devastates most long-term memory, the more remote facets can remain intact.”

— Robert M. Sapolsky

155. “Schultz’s group has shown that the magnitude of an anticipatory dopamine rise reflects two variables. First is the size of the anticipated reward. A monkey has learned that a light.”

— Robert M. Sapolsky

156. “We process emotionally salient information more rapidly and automatically, but with less accuracy. Frontal function – working memory, impulse control, executive decision making, risk assessment, and task shifting – is impaired, and the frontal cortex has less control over the amygdala. And we become less empathic and prosocial. Reducing sustained stress is a win-win for us and those stuck around us.”

— Robert M. Sapolsky

157. “When a rat wins a fight, the number of testosterone receptors increases in the ventral tegmentum and accumbens, increasing sensitivity to the hormone’s feel-good effects.10.”

— Robert M. Sapolsky

158. “Thus, we tend to think of Us as noble, loyal, and composed of distinctive individuals whose failings are due to circumstance. Thems, in contrast, seem disgusting, ridiculous, simple, homogeneous, undifferentiated, and interchangeable.”

— Robert M. Sapolsky

159. “Thus, adult behavior produces persistent molecular brain changes in offspring, “programming” them to be likely to replicate that distinctive behavior in adulthood.76.”

— Robert M. Sapolsky

160. “I think like an academic egghead, believing that if I write enough paragraphs about a scary subject, give enough lectures about it, it will give up and go away quietly. And if everyone took enough classes about the biology of violence and studied hard, we’d all be able to take a nap between the snoozing lion and lamb. Such is the delusional sense of efficacy of a professor.”

— Robert M. Sapolsky

161. “And behavior is altered by “situational labels” – call the game the “Wall Street Game,” and people become less cooperative. Calling it the “Community Game” does the opposite.”

— Robert M. Sapolsky

162. “Our prototypical behavior has occurred. How was it influenced by events when the egg and sperm that formed that person joined, creating their genome – the chromosomes, the sequences of DNA – destined to be duplicated in every cell in that future person’s body? What role did those genes play in causing that behavior?”

— Robert M. Sapolsky

163. “And then you increase the view to encompass factors larger than that one individual – how has culture shaped the behavior of people living in that individual’s group? – what ecological factors helped shape that culture – expanding and expanding.”

— Robert M. Sapolsky

164. “While average finger number is an inherited trait, the heritability of finger number is low – genes don’t explain individual differences much.”

— Robert M. Sapolsky

165. “Remarkably, the fetal brain generates far more neurons than are found in the adult. Why? During late fetal development, there is a dramatic competition in much of the brain, with winning neurons being the ones that migrate to the correct location and maximize synaptic connections to other neurons. And neurons that don’t make the grade? They undergo “programmed cell death” – genes are activated that cause them to shrivel and die, their materials then recycled.”

— Robert M. Sapolsky

166. “The impact of social relationships on life expectancy appears to be at least as large as that of variables such as cigarette smoking, hypertension, obesity, and level of physical activity.”

— Robert M. Sapolsky

167. “What helps define a particular culture? Values, beliefs, attributions, ideologies.”

— Robert M. Sapolsky

168. “By ages four through six, kids in cultures from around the world respond negatively when they are the ones being shortchanged. It isn’t until ages eight through ten that kids respond negatively to someone else being treated unfairly.”

— Robert M. Sapolsky

169. “This is the essence of learning. The lecturer says something, and it goes in one ear and out the other. The factoid is repeated; same thing. It’s repeated enough times and – aha! – the lightbulb goes on and suddenly you get it. At a synaptic level, the axon terminal having to repeatedly release glutamate is the lecturer droning on repetitively; the moment when the postsynaptic threshold is passed and the NMDA receptors first activate is the dendritic spine finally getting it.”

— Robert M. Sapolsky

170. “What the science in this book ultimately teaches is that there is no meaning. There’s no answer to “Why?” beyond “This happened because of what came just before, which happened because of what came just before that.” There is nothing but an empty, indifferent universe in which, occasionally, atoms come together temporarily to form things we each call Me.”

— Robert M. Sapolsky

171. “Consider this: the human genome codes for about 1,500 different TFs, contains 4,000,000 TF-binding sites, and the average cell uses about 200,000 such sites to generate its distinctive gene-expression profile.5 This is boggling.”

— Robert M. Sapolsky

172. “Be dubious about someone who suggests that other types of people are like little crawly, infectious things.”

— Robert M. Sapolsky

173. “For starters, circulating oxytocin levels are elevated in couples when they’ve first hooked up. Furthermore, the higher the levels, the more physical affection, the more behaviors are synchronized, the more long-lasting the relationship, and the happier interviewers rate couples to be.”

— Robert M. Sapolsky

174. “The biologies of strong love and strong hate are similar in many ways, as we’ll see.”

— Robert M. Sapolsky

175. “Often we’re more about the anticipation and pursuit of pleasure than about the experience of it.”

— Robert M. Sapolsky

176. “If people around you smell scared, your brain tilts toward concluding that you are too.25.”

— Robert M. Sapolsky

177. “A critical realization roared through the research community: the physiological stress-response can be modulated by psychological factors. Two identical stressors with the same extent of allostatic disruption can be perceived, can be appraised differently, and the whole show changes from there.”

— Robert M. Sapolsky

178. “THE AMYGDALAfn8 IS the archetypal limbic structure, sitting under the cortex in the temporal lobe. It is central to mediating aggression, along with other behaviors that tell us tons about aggression.”

— Robert M. Sapolsky

179. “Estrogen enhances executive function, working memory, and impulse control and makes people better at rapidly switching tasks when needed.”

— Robert M. Sapolsky

180. “Thus, over the course of seconds sensory cues can shape your behavior unconsciously.”

— Robert M. Sapolsky

181. “Sam Harris argues convincingly that it’s impossible to successfully think of what you’re going to think next. The takeaway from chapters 2 and 3 is that it’s impossible to successfully wish what you’re going to wish for. This chapter’s punchline is that it’s impossible to successfully will yourself to have more willpower. And that it isn’t a great idea to run the world on the belief that people can and should.”

— Robert M. Sapolsky

182. “Crucially, the brain region most involved in feeling afraid and anxious is most involved in generating aggression.”

— Robert M. Sapolsky

183. “It’s not until the non-NMDA has been stimulated over and over by a long train of glutamate release, allowing enough sodium to flow in, that this activates the NMDA receptor. It suddenly responds to all that glutamate, opening its channels, allowing an explosion of excitation. This is the essence of learning.”

— Robert M. Sapolsky

184. “So if whites see a black face shown at a subliminal speed, the amygdala activates.10 But if the face is shown long enough for conscious processing, the anterior cingulate and the “cognitive” dlPFC then activate and inhibit the amygdala. It’s the frontal cortex exerting executive control over the deeper, darker amygdaloid response.”

— Robert M. Sapolsky

185. “There is something wrong if an instance of free will exists only until there is a decrease in our ignorance.”

— Robert M. Sapolsky

186. “As Beck and other cognitive therapists have emphasized, much of what constitutes a depression is centered around responding to one awful thing and overgeneralizing from it – cognitively distorting how the world works.”

— Robert M. Sapolsky

187. “In order to prove there’s free will, you have to show that some behavior just happened out of thin air in the sense of considering all these biological precursors. It may be possible to sidestep that with some subtle philosophical arguments, but you can’t with anything known to science.”

— Robert M. Sapolsky

188. “I once received a lesson in kids’ private world of rule making from my then-four-year-old son. We had gone to a public bathroom together; we stood side by side at two urinals, and I finished a bit earlier than he did. “I wish we had finished at the same time,” he said. Why? “We get more points that way.”

— Robert M. Sapolsky

189. “To summarize this section, when you try to do the harder thing that’s better, the PFC you’re working with is going to be displaying the consequences of whatever the previous years have handed you.”

— Robert M. Sapolsky

190. “University of Cambridge.68 When compared with non-CAH girls, CAH girls do more rough-and-tumble play, fighting, and physical aggression. Moreover, they prefer “masculine” toys over dolls. As adults they score lower on measures of tenderness and higher in aggressiveness and self-report more aggression and less interest in infants. In addition, CAH women are more likely to be gay or bisexual or have a transgender sexual identity.”

— Robert M. Sapolsky

191. “The authors first replicated this effect, showing that watching a short film clip of something physically disgusting made subjects more morally judgmental – unless they had washed their hands after watching the film. Another study suggests that the washing decreases emotional arousal, as it decreased the diameter of subjects’ pupils.”

— Robert M. Sapolsky

192. “If we were designed by engineers, as we consumed more, we’d desire less. But our frequent human tragedy is that the more we consume, the hungrier we get. More and faster and stronger.”

— Robert M. Sapolsky

193. “This book has a goal – to get people to think differently about moral responsibility, blame and praise, and the notion of our being free agents. And to feel differently about those issues as well. And most of all, to change fundamental aspects of how we behave.”

— Robert M. Sapolsky

194. “Let me state this most broadly, probably at this point too broadly for most readers: we are nothing more or less than the cumulative biological and environmental luck, over which we had no control, that has brought us to any moment.”

— Robert M. Sapolsky

195. “Parts of the book describe work carried out in my own laboratory, and these studies have been made possible by funding from the National Institutes of Health, the National Institute of Mental Health, the National Science Foundation, the Sloan Foundation, the Klingenstein Fund, the Alzheimer’s Association, and the Adler Foundation.”

— Robert M. Sapolsky

196. “If they’re told, “The drug has a 95 percent survival rate,” people, including doctors, are more likely to approve it than when told, “The drug has a 5 percent death rate.”

— Robert M. Sapolsky

197. “Our worst behaviors, ones we condemn and punish, are the products of our biology. But don’t forget that the same applies to our best behaviors.”

— Robert M. Sapolsky

198. “Did destruction of the human amygdala lessen aggression? Pretty clearly so, when violence was a reflexive, inchoate outburst preceding a seizure.”

— Robert M. Sapolsky

199. “Genes have plenty to do with behavior. Even more appropriately, all behavioral traits are affected to some degree by genetic variability.65 They have to be, given that they specify the structure of all the proteins pertinent to every neurotransmitter, hormone, receptor, etc. that there is. And they have plenty to do with individual differences in behavior, given the large percentage of genes that are polymorphic, coming in different flavors. But their effects are supremely context dependent.”

— Robert M. Sapolsky

200. “Suppose a major traumatic stressor occurs, of a sufficient magnitude to disrupt hippocampal function while enhancing amygdaloid function. At some later point, in a similar setting, you have an anxious, autonomic state, agitated and fearful, and you haven’t a clue why – this is because you never consolidated memories of the event via your hippocampus while your amygdala-mediated autonomic pathways sure as hell remember. This is a version of free-floating anxiety.”

— Robert M. Sapolsky