Veritasium dives into the mathematics of “six degrees of separation,” tracing how Duncan Watts’s small-world model, Steve Strogatz’s clarity, and Albert-László Barabási’s hub theory reveal that real-world networks shrink dramatically thanks to shortcuts, weak ties, and the rich-get-richer rule of preferential attachment.
Through interactive simulations—showing disease spread, viral messaging, and even the Prisoner’s Dilemma—the video demonstrates not only why the world really is “small,” but how our individual connections and behaviors can ripple out to change global outcomes.
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