Why is a god a metaphysical necessity?
For a couple reasons. 1. It is logically possible for God to exist, and all possible necessary truths must be true. 2. An uncaused cause is necessary because if you take God out of the equation, you are stuck with the absurd notion of an infinite chain of events leading up to the present moment, which is irrational.
Millions of us have no need for such a figurehead. Please, explain the necessity.
You may be able to live your life without such a figurehead, but you wouldn't be able to have life without such a figurehead. And the necessity was explained, see above.
Might be time to brush up on your scientific knowledge. Evolution does not assume anything concerning life coming from non-life.
If life can't come from nonlife, then there would be no life for evolution to take off in the first place.
I am sure that I am not the first one to state this here, but evolution concerns itself with the development of life.
Maybe you are the one that need to brush up on your science. Evolution does not concern itself with the developement of life. It concerns itself with the developement of species.
Still, here are two videos that allow you to get the basics of how life began.
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How Did Life Begin? - YouTube
Lets not fool ourselves. We do not know how life can come from nonlife. The closest we've ever come was the Miller experiment and even that still had miles to go. Life from nonlife is one of the biggest mysteries of science. Don't know what that video is about and I don't pay attention much to links or videos posted on here. I can easily post videos and links supporting my position as well, as they are also out there.
Once youve seen that, listen to what Kraus has to say and that might help you understand how the RNA formed. It would be better if you took the time and listened to the whole lectures that Kraus gives, the ORIGINS lectures are on YouTube.
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Lawrence Krauss presents "Something from Nothing and the Magic of Reality" Part 1 - YouTube
Krauss was already dismantled by Bill Craig. The only videos that are made now are by his ghost.
Try Neil DeGrasse Tyson, he can give you the short version. And no, it does not defeat atheism in any way shape or formit reaffirms it.
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The Astounding Fact About The Universe - Neil Degrasse Tyson - YouTube
I've never seen Neil Degrasse Tyson have a debate with anyone regarding these subjects. Until I see him engage in a formal or informal debate regarding these issues where his position is attacked and critiqued, and he has to go through the motions of defending his position, then I don't want to be bothered with him.