With modern technology I don't see any reason why we should be as big as we are. 1/3 or 1/4 the size with sufficient strenght to bear the skull and contents would be a huge benefit. We would consume far less food, our vehicles could be smaller and our dwellings could be much more efficient and cost effective to build. We could also loose some of those features of ours that evolution didn't do such a great job of like teeth - what a pain they are! We should have teeth like sharks that rip raw flesh and can grow a new set when the old ones become loose or damaged.
Ultimately this will enable us all to evolve into lawyers but unfortunately we will spend so much time countersuiting that when the little green men come to take over the planet we will be so busy arguing with eachother that no one will notice. We are truely a doomed race.
