Call me bitter but growing up I've realized that some things do not change much from High School. There are still cliques, and there is still the craving to be accepted by the "cool people". Getting older you figure out different ways to prey on the weak whether it be soccer moms ganging up on someone whose still childless or not being invited to the annual neighborhood BBQ down the street. It may not be the same as the petty things we dealt with like not sitting next to someone at the lunch table but it still hurts the same. As the years progress though--we just have more things to distract us and for this reason its easier to bounce back and forget about the hurtful actions of others. Either this or its true what they say that the older you get the wiser you become.
I have often wondered why the never ending quest to be associated with popular people. I think its down to the primal urge of survival of the fittest. If the weak in the pack shadow the strong--maybe their status will improve and they will one day emerge the leader. I believe this is why many people refuse to even speak to or acknowledge those that are deemed "weak" in any way---it does not benefit or improve their social standing.
Anyway--I'll never understand the psychology surrounding people sometimes. Although I believe people are generally good--I just think they forget whats important. Even if some things dont change from high school I do think as you get older more are willing to step out of that "mean girl" phase and help those that may be trailing behind. People are generally good in my opinion and whether you are 30 or 84 you eventually figure stuff like this out.