I had to choose a topic related to Darwin, and since I believe in the evolution theory, but also believe in God, my main focus is theistic evolution).
But it's a strange leap from belief in God to arguing that he guides evolution as a primary cause.
It's as though someone were to say; "I believe that the planets travel in ellipses; but because I believe in God, I want to prove that God, not the law of gravity and the laws of motion, causes them do so."
As I have pointed out, this is theologically dubious. If God created the Universe and its laws, surely it would be smarter of him to create it with laws that achieve his purpose, rather than laws that thwart his purpose and that he needs to overcome with a series of miracles.
The evidence for the evolution theory (to support that evolution is true), but after that I want to convince people that
evolution should be guided by god (The only thing I still need to work on).
Your terminology is wrong. The
theory of evolution is the explanation of how evolution works: mutation, recombination, natural selection, genetic drift, and so forth. What you
believe in is the
fact of evolution; you are trying to argue
against the
theory of evolution.
It is argued that evolution would require some kind of guidance to guarantee that random variation combined with undirected selection would produce any particular creature. There are simply too many accidents involved without guidance.
"Too many"? Oh, but I forgot, you didn't require that the arguments should be scientific, or you'd need some sort of numbers in it.
Another argument I have (maybe not directly related to guidance by god, but to faith/belief), is a question James and Clifford ever proposed:
Must ALL your beliefs be dictated by the evidence you have and by nothing else?
Imagine if you were sitting on a jury and the counsel for the defense addressed that argument to you. Wouldn't you start to think that he must have an incredibly weak case?
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Here's an argument against God acting as the primary cause of evolution. (Yes, I know it's not what you asked for, but it's what I've got.)
The history of evolution is littered with failures and dead-ends. We can point to species that didn't make it ... and genera ... and families ... and orders ... and classes ... and phyla. At the lowest level, we see lots of failed mutations that will never make it: mutations that lead to death or severe handicap or sterility. Does this look like the product of a perfect, all-knowing God, or of the hit-and-miss processes described by the theory of evolution?