with social mobility I'd like to see the "problem" of unrestricted human reproduction (in places other than Communist China) addressed.  Perhaps the poor would breed less if they had better things to do.

I don't mind living poor; have done so all my life.  True, I would not want to be a Gaza citizen at this stage in human history.  

I do not envy the wealthy/powerful.  We are all stuck on this rock for one life sentence, and as Jim Morrison once sang, "No one here gets out alive."

They tried to assimilate me. They failed.