Several things....

1)I'll tell you what Sarah Palin is up to: She is tired of dodging questions, reading harsh reviews of her campaign, going to work everyday with folks who no longer respect her...etc., and now she is so well-known...as in 'notorious'...that she can write a book or two, and only has to pop-up now & then on HER schedule to keep fanning the flames - sort of like Ann Coulter. She will make millions and live comfortably and raise her family (provided no indictable offenses come to light). Not bad for being yanked out of obscurity a year ago.

2)After disagreeing with Rig on so many things, it is 'slightly' awkward for me to agree with him totally that overpopulation is the single greatest threat to humanity. It is the 'keystone' issue....if we solve ALL the other environmental problems and stop war besides, we will still be in trouble when there are 97 billion people.
My father used to befuddle my brother & I by asking, "If you were carrying all the feathers you can carry, can you carry one more?"
Apparently, the common answer is "sure!" Meaning, I suppose, that it is too hard to tell, and adding one feather seldom makes a huge difference. But you KNOW you can't carry 4 tons of feathers, so somewhere down about 200-400 lbs of feathers, you are gonna get so tired you collapse. You do the metaphor on population.

3) Palin's child IS retarded...the child is not insulted by the word, only those who want a PC version of everything. (I am, officially, OLD. 'Senior citizen' does not make me less old, and the guys who come by every Monday are 'trash collectors', not 'environmental refuse associates'.)
I would not call her child "a retard" to her face - nor even in print...he is a child, and no one needs a sad label applied to a loved one. But a non-judgmental adjective is a different matter. There may be other words, but 'retarded' is not prima facie insulting.