Why Do We Shake Hands to Seal a Deal?

This episode explores how the handshake evolved from a simple greeting into one of the strongest symbols of agreement and trust. In ancient Mesopotamia, Greece, and Rome, shaking hands represented honesty—open palms showed no weapons, and clasped hands created a physical pledge. The Greeks even depicted handshakes between gods and humans as a sacred symbol of unity. Over centuries, traders, knights, and diplomats used the gesture to confirm promises long before written contracts existed. A person’s handshake reflected their character—firm and steady meant trustworthy, while breaking a handshake agreement meant losing respect. Even today, despite digital signatures and legal paperwork, people still feel that a handshake “makes a deal real.” Psychologically, the brief touch releases oxytocin, increasing feelings of trust and cooperation. Though the handshake briefly declined during the pandemic, history shows it always returns because it satisfies a deep human need for connection. A handshake may last only seconds, but it carries thousands of years of meaning—an ancient ritual that turns spoken agreements into shared, human commitments.