Something Strange Happens When You Trace How Connected We Are

Veritasium unpacks the surprising math of “six degrees of separation,” showing how tiny shortcuts and weak ties in huge social networks turn them into “small worlds.” You’ll explore Watts–Strogatz’s model, see how diseases (or ideas) spread at lightning speed, and meet network hubs born from Barabási’s preferential attachment rule.

Along the way, you get hands-on with simulations, peek at the Prisoner’s Dilemma in action, and discover how even your everyday choices can ripple through the global network and change the world.

Watch on YouTube