Why'd It Take So Long To Invent The Wheel?

Why'd It Take So Long To Invent The Wheel?https://www.npr.org/sections/krulwich/2011/09/15/140508448/whyd-it-take-so-long-to-invent-the-wheel
https://www.worlds50.com/2019/04/whyd-it-take-so-long-to-invent-wheel.html