What does it mean that social environment as choice architecture?

The people around you shape your choices — curate your social environment.

Example: You decide to start waking up at 6 a.m. to write before work. For two weeks you hold the routine. Then your roommate starts staying up until 1 a.m. watching shows in the living room, and you find yourself joining for "just one episode." Within a month, your wake-up time has drifted back to 7:30 and the writing has stopped. You blame your willpower. But your willpower did not change. Your social environment changed. The person in your living room reshaped your evenings, which reshaped your mornings, which reshaped whether you write. You did not fail at discipline. You failed at social environment design.

Try this: Draw three concentric circles on a piece of paper. In the innermost circle, write the 3 to 5 people you spend the most time with — daily or near-daily contact. In the middle circle, write the next 10 to 15 people you interact with weekly. In the outer circle, write 20 to 30 people you see monthly or less. Now, for each person in the inner circle, answer honestly: Does this person make your most important behaviors easier or harder? Not whether they are a good person — whether their presence, habits, and conversational defaults structurally support or undermine the life you are trying to build. If more than half of your inner circle makes your priority behaviors harder, you have a social architecture problem that no amount of willpower can solve.