[devonin]

If you replace the phrase "Political correctness" with "Basic human respect" I think you'll answer a lot of your own questions.

Maturity, generally to me, is an ability to consider consicously and comprehend points of views outside yourself, and have the ability to empathize with those views, and be willing, in the name of exhibiting that empathy and respect, to consider actually changing your behavior if it is shown to be inimical to demonstrating respect for the rights of others, instead of clinging to selfish attitudes.

As one matures physically and hormonal imbalances start to level off, it certainly becomes easier to attain the state of mind needed for that kind of respectful and selfless thought. We're definitely more selfish in our teenage years than our adult years in most cases.

So I think I come down more on "abide present rules etc" and "rationally judge"

I think it is not so much a question of inherent or learned. I guess I'd say learned, but it's less about "maturity is learned" and more "Either maturity or immaturity is learned"