The story I heard in a medeival history class about the origin of the handshake is that it’s a sign that you don’t mean to attack the other person because you’re not holding a weapon in your hand
Have heard similar from multiple sources. With an added bit about it also exposing you to attack from the other person as you would have to move your shield.
I would guess someone invented the handshake in prehistoric times and we just have no medium in which a record could exist aside from an undiscovered cave drawing or something like that. Humans seem to naturally touch hands outside of any social influence or cultural history. Babies reach out and people touch their hands. It seems like a pretty intuitive human action. We touch things with our hands, so other hands seems natural as a thing to touch. The shake just seems like a minor variation on that.
Humans seem to naturally touch hands
Some a lot more than others, and it’s usually the ones with really gross hands. Just saying.
Chimps shake hands.
https://phys.org/news/2021-05-chimps-handshakes-social-group.html
That is the worst way to describe that.
Its like Nathan Pyle if he never became successful and sounded like he has people locked in his basement
One silver lining from the pandemic was that fist bumps became more common in lieu of handshakes. Some people’s hands can be filthy.