GoKawiilHard work is grinding and only partly reliable. Luck is random by definition. Research on who you know is far more specific than most networking advice.
Three things supposedly decide whether you succeed: how hard you work, how lucky you get, and who you know. Hard work gets treated as the real answer, the one thing fully within your control, the reason someone made it and someone else did not. The best evidence available says that is not the deciding factor. Who you know is.
Raj Chetty and a team of economists used 21 billion Facebook friendships from 72 million Americans to measure economic connectedness, the share of a person's friends who earn more than they do. Children who grow up with high economic connectedness earn 20 percent more as adults on average than otherwise similar children who do not, a gap equal to growing up in a family making 47,000 dollars a year instead of 27,000. It was the single strongest predictor of upward mobility they found, ahead of school quality, segregation, and poverty rates.
People near the bottom of the income ladder have almost no rich friends. Fewer than 2 percent of their friends are in the top 10 percent of earners.
People at the top cluster with each other instead: 34 percent of their friends come from that same top 10 percent.
Network cohesion and high rates of volunteering, the kind of social capital most people actually try to build, showed no meaningful link to upward mobility.
The same pattern shows up in how people find jobs, not just how much they eventually earn. A classic 1973 survey found that 56 percent of men got their job through a contact they saw only occasionally, not a close friend. A 2022 randomized experiment on 20 million LinkedIn users confirmed the effect is causal: moderately weak ties, people you know a little but not well, created more job mobility than close ones.
Hard work and luck are both real, but neither is a lever you can pull whenever you want. The circle of people you know a little, not well, is a lever you can pull, the same way an algorithm pulled it for millions of LinkedIn users just by suggesting the right people to them. Most people spend a decade optimizing how hard they work and never spend an afternoon on who they know. The data says they have it backwards.