hmmm...man that is tough, I guess the easy one would be hate...no more bigots, racists, gay bashing, politics

, etc...no more war, peace on earth good will toward men.
The other one is competition...it exists on every level of human life, from the minute you are born you are compared to other babies (size, weight, intellegnce) and that continues forever...it fuels a lot of the problems in the world, resources, money, greed...on its very basic level it isn't all bad, the drive to get better, the evolution of human thought are usually the result of the drive to be better than the next person or group or nation. The negatives I think outweigh some of those positives