In 1994, Harvard researchers began a study that would follow over 12,000 people for 32 years. What they discovered changed how we understand habits.
They found that if your friend becomes obese, your chances of becoming obese increase by 57%. Not because they infect you with something, but because behaviors are contagious.
And it works both ways. If your social circle exercises, you probably will too. If your friends read, you probably will too.
Humans are tribal
For hundreds of thousands of years, belonging to a group was a matter of survival. Those expelled from the tribe died. Our brain evolved to seek social acceptance at all costs.
We don't want to be different. We want to be like our people.
This instinct is still active today. That's why we adopt the behaviors, beliefs, and even habits of the people around us. It's not weakness. It's biology.
Choose your tribe carefully
If you spend time with people who constantly complain, you'll start complaining. If you surround yourself with people who prioritize their health, you'll start prioritizing yours.
Your group's normal behavior becomes your normal behavior.
How to harness the power of the tribe
1. Join a community. Find a group of people who share the habit you want to build.
2. Share your habit with a friend. When someone knows what you're trying, you create commitment. When someone does the same with you, you create community.
3. Make your progress public. Not to show off, but to create accountability.
4. Celebrate others' victories. When you applaud someone else's progress, you reinforce the importance of the habit in your own mind.
You don't have to do it alone
The "self-made" narrative is a myth. No one achieves anything truly alone. The most dedicated runners have running groups. The most successful entrepreneurs have mentors.
Find your tribe. The path is easier—and more meaningful—when you walk it together.