i would agree that our existence is the result of evolution and the nature of dna. HOWEVER, at some point in that evolution consciousness emerged. Animals began to have the instinctual desire to survive. As humans emerged this instinctual desire to survive became a fear of death, a fear of the unknown. As i see it humans created religion to deal with their fear of the unknown, that unknown of course being the meaning of their existence and if in fact there was more to their existence than their mortal lives. An examination of the evolution of religion in my opinion further supports this idea in that the egyptians, greeks, romans and other early civilizations fewed the cellestial bodies as gods, and derived their religion from stories about these gods which today we call myths. I find it hard to distinguish the difference between their “myths” and books such as the torah, bible or koran.
That said i would also say that i too after considering this question have only found myself with more questions and few definite answers. I have only been able to eliminate possibilities as very minute. I do not know what the higher meaning of life is, so as a result i am forced to live a pragmatic idealism devoted to the finding those answers.
Religion can be a wonderful thing, especially if it is able to instill in people the ideas of right from wrong, or put in another way just behavior and intentions. That is all we can ask from each other is that people be fair and just to one another and allow others to live.
Much of what i see people seeing as an answer to the question of why we are here are simply the result of social constructs that have survived many generations and the longer they have been around the more ingrained they are making the idea that they are nothing more than the creation of man harder and harder to accept. One could counter that argument that human thought is a social construct because our thoughts are expressed by way of language which was created by man. I say this because i dont immediately deny something as being valid or beneficial becuase it is a social or any other construct. I am simply saying that one must question everything especially those things which were created by people to solve their problems during the time they lived which may or may not apply any longer. IMHO, only by questioning everything can someone truly say they have a general answer to the question of why we are here.