There is one thing that sets us apart from animals. No, it’s not our ability to reason, or laugh, or use tools.
It’s our ability to make and obey traffic laws.
Most people fail at obeying traffic laws. In every city I’ve ever driven, I have heard someone say that this particular city has the worst drivers. And the funny thing is, they’re probably all correct.
I was on foot attempting to cross a street with no crosswalk yesterday, and there was a car approaching from my left who slowed and waved for me to go ahead. They thought they were being courteous to me, and grew annoyed when I waved them on and refused to cross the street. You see, there was a car coming from the opposite direction. So waving me across would have meant that I would have had to stop in the middle of the road and wait for the second car to pass.
This demonstrates the problem quite nicely.