> collective madness

mass hysteria perhaps?

There used to be a time where people used to die from dancing too much (from my understanding in which hey I can be wrong, I usually am): https://en.wikipedia.org/wiki/Dancing_plague_of_1518

I think that although we wish to consider ourselves as smart and really intelligent but we run on biological machines and clocks which evolutionary have not much of a difference since 1518 or even the times when we used to hunt and forage for that matter.