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“Scelza also discovered that cultures differ dramatically in how much parental investment men typically devote to their children. In cultures with heavy male parental investment, men showed an even stronger endorsement of sexual infidelity as more distressing than emotional infidelity; more than 90 percent in those cultures, such as the Himba, chose sexual infidelity as more jealousy inducing. The more investment men make, the more important it becomes for them to ensure that they are the actual genetic fathers, at least from an evolutionary perspective. In short, cultures vary in how jealous men get about a partner’s sexual infidelity, but it’s not random or arbitrary cultural variability. It is theoretically predictable variability based on how much men invest in their children, which in turn corresponds to the costs they would incur by investing in a child who might just be their rival’s.”
― David M. Buss, When Men Behave Badly: The Hidden Roots of Sexual Deception, Harassment, and Assault

“From time to time in the years to come, I hope you will be treated unfairly, so that you will come to know the value of justice. I hope that you will suffer betrayal because that will teach you the importance of loyalty. Sorry to say, but I hope you will be lonely from time to time so that you don’t take friends for granted. I wish you bad luck, again, from time to time so that you will be conscious of the role of chance in life and understand that your success is not completely deserved and that the failure of others is not completely deserved either. And when you lose, as you will from time to time, I hope every now and then, your opponent will gloat over your failure. It is a way for you to understand the importance of sportsmanship. I hope you’ll be ignored so you know the importance of listening to others, and I hope you will have just enough pain to learn compassion. Whether I wish these things or not, they’re going to happen. And whether you benefit from them or not will depend upon your ability to see the message in your misfortunes.”
― Greg Lukianoff, The Coddling of the American Mind: How Good Intentions and Bad Ideas Are Setting up a Generation for Failure

“In heroin addicts, I had seen the debasement that comes from the loss of free will and enslavement to what amounts to an idea: permanent pleasure, numbness, and the avoidance of pain. But man’s decay has always begun as soon as he has it all, and is free of friction, pain, and the deprivation that temper his behavior.”
― Sam Quinones, Dreamland: The True Tale of America's Opiate Epidemic

“Like no other particle on earth, the morphine molecule seemed to possess heaven and hell. It allowed for modern surgery, saving and improving too many lives to count. It stunted and ended too many lives to count with addiction and overdose. Discussing it, you could invoke some of humankind’s greatest cultural creations and deepest questions: Faust, Dr. Jekyll and Mr. Hyde, discussions on the fundamental nature of man and human behavior, of free will and slavery, of God and evolution. Studying the molecule you naturally wandered into questions like, Can mankind achieve happiness without pain? Would that happiness even be worth it? Can we have it all?”
― Sam Quinones, Dreamland: The True Tale of America's Opiate Epidemic