Turning corners in a car takes longer, and all of the cars wouldn't go as smoothly because you need to slow down some to turn a corner. Since racetracks are ovals the drivers just need to turn, which you don't really need to slow down for.
They became stronger and more fortified with the use of tools. They could now chisel stone and construct shelters from stone.
Explanation:
avoiding drugs and alcohol
not giving priority to such feelings
meditating
also being educated about stuff
