Why Do We Shake Hands When Meeting Someone New?

This episode explores why the handshake became the standard way to greet someone new and why it remains so powerful today. The practice began as a survival signal in early human history, when extending an open hand showed peaceful intent and the absence of weapons. Ancient Greeks used the handshake as a symbol of equality and goodwill, while Romans adapted it to check for hidden weapons, blending trust with caution. Over time, the handshake evolved into a social ritual. In medieval Europe, it confirmed honorable conduct in duels and trade. In modern democratic societies, it replaced hierarchical greetings, symbolizing equality between individuals. Psychologically, the brief physical contact activates trust-related responses in the brain, shaping first impressions and emotional connection. Even in a digital world—and despite temporary disruptions—the handshake persists because it fulfills a deep human need for recognition, reassurance, and trust. What appears to be a simple gesture is, in fact, a centuries-old ritual that quietly turns strangers into acknowledged equals.