we are doomed as a species! If you need proof, just look around. If there is an intersection, That 99% of us can navigate, but 1 weak link has to pull out in front of a tractor trailer (natural selection at work), then we must put a traffic light up to protect the morons,that are lacking in the skill set, to look both ways and proceed when it's safe. Everywhere you look, you can see the barriers against natural selection going up, and without natural selection,we are doomed. Im not saying to remove all traffic lights, just stating an observation.