A homogeneous network feeds you sameness; people from other fields, ages and backgrounds bring the ideas and contacts you'd never find alone.
The idea
Swiss engineer George de Mestral came home from a hike covered in burrs, noticed how they clung, and invented Velcro (which keeps my kids' shoes on, since laces remain a mystery to them). That's the Medici Effect: ideas from different disciplines cross-pollinating into something new. Networks work the same way. If your circle is people who look like you, read the same things and know the same people, it's comfortable, and you get sameness back. A diverse network brings ideas you'd never come across, plus new contacts who bring more new contacts.
How to do it
Look at your network honestly. How many people differ from you in field, age, background or career path?
Reach out to people who are truly different. Cold outreach feels scary, but the risk is tiny next to the upside.
Join groups with people from different backgrounds.
Host a second-degree dinner: you and a co-host each invite your own people.
Share content outside your comfort zone, so different people find you.
Learn from people you can't reach directly: books, podcasts, even science fiction.
Example
President Kennedy surrounded himself with brilliant "whiz kids" from Yale, Harvard and MIT, and they helped steer him into the Vietnam War. A Harvard Business School study found companies with more diversity are more innovative and more profitable. A more diverse set of advisors might also have stopped me from accepting a college dare to drink a whole cup of soy sauce.
Be a Dot Collector: Collect varied experiences, people and projects now without knowing how they'll connect, then review the collection for surprising combinations.
Second-Degree Dinners: Co-host a dinner with one other person and each invite your own guests, so half the room is new to each host.
Three Connector Personalities: Conveners build dense networks, Brokers bridge worlds, Expansionists cast wide nets; find your natural style and lean into it.
Curiosity Plus Proximity: Use AI as a research partner to feed your curiosity, never as a replacement for thinking. Then bring what you learn to good people.