why DID we evolve into humans?

I’m new to this forum, I got a random e-mail from some Jesus freak about carbon dating being inaccurate so I did some research on my own and found this forum.This kind a goes under this subject,I’m big into philosophy I’m actually a libertarian socialist actual anarchist anarco any wayWhy did we develop conscious thought? Why would that trait be beneficial in a situation of life or death? Not logical decision making, or rationality, but the whole, I think therefore I am thingAlso, on the whole thing about there only being one way of evolving, what about sexuality, given your example one gene is passed on because its possessors lived in the modern world, just about every one lives but we are still evolving, getting taller, stronger, and so on because of what is sexually attractive, and who is able to mateAlso from what I’ve read, evolution, mutations, don’t really happen unless there is a large catastrophic event, i.e. ice age not sure where that came from hmm, any one read that also? Or am I pulling stuff from the mystery bag of B.S.

How so? Dolphins, and whales have an advanced language system but they don’t have conscious thought at what point is consciousness advantageous to a species can you imagine being the 1st one to have consciousness? given you wouldn’t have the intellect that you do now, it would still be horrible any way, I don’t see how it’s just a side effect that because you are able to communicate that you suddenly have consciousness. yea thats what I was thinking about..