Umm, to all of the people who say that God designed us this way, and that we shouldn't change that, I have news for you.
'God' has given us this knowledge, so why shouldn't we use it? If "He" didn't want us to have it, then we wouldn't.
Anyone who knows the story of Noah's Ark would know that God said that he would no longer meddle with the affairs of Humans. He would let us develop as we would. This is where we have developed to, and we continue to develop past this point. 'God is no longer a part of these arguments.
This is harsh, I know, but people cannot keep on using the 'God' argument.