[quote=DarkwolfX37]
Recognizing that in itself qualifies you as one.If that's the case then there have been very few adults to ever live on this planet.Pick your favorite.
[/quote]

I am an adult in that respect alone, but this is not the only prerequisite for adulthood. I believe I would do an okay job on my own, and I am more mature than most my age, but in the end, I am still only a kid. Not a child, but a kid.
And to your second point, that is because of societal corruption. Other, "cooler", opinions get into one's mind and convince them that the wrong action is the best action. Through correct parenting, yes parenting, of all things, more people would be classified as adults, by my definition.