The authors pointed out that nearly all research in psychology is conducted on a very small subset of the human population: people from cultures that… - Jonathan Haidt

The word “coherence” literally means holding or sticking together, but it is usually used to refer to a system, an idea, or a worldview whose parts fit together in a consistent and efficient way. Coherent things work well: A coherent worldview can explain almost anything, while an incoherent worldview is hobbled by internal contradictions. …

Whenever a system can be analyzed at multiple levels, a special kind of coherence occurs when the levels mesh and mutually interlock. We saw this cross-level coherence in the analysis of personality: If your lower-level traits match up with your coping mechanisms, which in turn are consistent with your life story, your personality is well integrated and you can get on with the business of living. When these levels do not cohere, you are likely to be torn by internal contradictions and neurotic conflicts. You might need adversity to knock yourself into alignment. And if you do achieve coherence, the moment when things come together may be one of the most profound of your life. … Finding coherence across levels feels like enlightenment, and it is crucial for answering the question of purpose within life.

People are multilevel systems in another way: We are physical objects (bodies and brains) from which minds somehow emerge; and from our minds, somehow societies and cultures form. To understand ourselves fully we must study all three levels — physical, psychological, and sociocultural. There has long been a division of academic labor: Biologists studied the brain as a physical object, psychologists studied the mind, and sociologists and anthropologists studied the socially constructed environments within which minds develop and function. But a division of labor is productive only when the tasks are coherent — when all lines of work eventually combine to make something greater than the sum of its parts. For much of the twentieth century that didn’t happen — each field ignored the others and focused on its own questions. But nowad

let’s imagine that 95 percent of the food on Earth magically disappears tonight, guaranteeing that almost all of us will starve to death within two months. Law and order collapse. Chaos and mayhem ensue. Who among us will still be alive a year from now? Will it be the biggest, strongest, and most violent individuals in each town? Or will it be the people who manage to work together in groups to monopolize, hide, and share the remaining food supplies among themselves?

People don't adopt their ideologies at random, or by soaking up whatever ideas are around them. People whose genes gave them brains that get a special pleasure from novelty, variety, and diversity, while simultaneously being less sensitive to signs of threat, are predisposed (but not predestined) to become liberals.