Insight by Psychology

When applicant pools are large relative to available slots, small amounts of luck matter more because random variation can shift rankings just enough that minor luck differences determine who enters the selected group.

When people are uncertain they look to perceived authorities rather than introspection because internal confusion undermines reliable self-judgment, so deferring to experienced voices reduces uncertainty.

Warm social connections slow biological aging because they reduce chronic inflammation and stress—the physiological drivers of many age‑related diseases—thereby lowering disease risk and preserving function.

Public beliefs change more through trusted leaders and prevailing narratives than by direct evidence because people adopt views based on whom they trust, so shifting leaders' positions can reframe collective opinion without individuals reevaluating evidence.

Country of birth explains large global income differences because national institutions, economic conditions, and resource distribution shape the opportunities available from childhood, materially raising expected lifetime earnings for those born in wealthier countries.

Your capacity for wholeheartedness is limited by how much heartbreak you're willing to endure, because wholehearted engagement requires vulnerability that exposes you to loss and pain.

We downplay luck's role in our success because fortunate events are external and unearned, so they don't register as things we did and therefore get omitted from our explanations for outcomes.

Eliciting a spoken, public commitment dramatically increases follow-through because people strive for consistency between their words and actions—prompting a verbal 'yes' can cut no-shows by about 64%.