There is no undiscovered missing link. That's an old myth, Mate.
You need to catch up on your science a bit.
Also, the scientific theory of evolution is NOT about disproving God. Science cares nothing about God. Science doesn't deal with ANY supernatural beings or causes - it only works in the natural world. And science has a REALLY good track record for proving things:
The Sun - was a God, now explained by science
The Moon - was a God, now understood by science
The stars - were God, now science
The tides - were attributed to God, now science
The seasons - attributed to God, now science
Earthquakes - were God, now science
Lightning - was God, now science
Rain - was God, now science
Health & disease - was God, now science
Origin of species - was God, now science (evolution)
Origin of first life - still God, but we're getting closer
Birth of universe - God before the Big Bang, science after
Many creationists believe in natural evolution - they believe God set off the Big Bang and let it run from there. Others believe the Book of Genesis is 100% factual history and life on Earth started in 4004 BC, in October. So there is no consistent "creationism" viewpoint.
Besides - James Hutton and other geologists disproved Biblical Creation long before Darwin put pen to paper.
So the argument is really "evolution acceptance" versus "evolution denial", where evolution denial is no different than any other form of reality denial. Evolution denial = Holocaust denial = lunar landing denial = round Earth denial.
Evolution-deniers claim Evolution is "only a theory". But in science, any complex model in science is called a "theory". The theory that life evolved from earlier life is as well supported as the "theories" that the continents drift, that germs cause disease and that stuff is made of atoms. You can bet you life on all of those "theories".
Evolution-deniers claim there is no evidence for Evolution. This is a lie. Here are a long list of strong evidence for evolution, and even a list of how you'd disprove evolution, and why the evidence supports evolution:
http://www.talkorigins.org/faqs/comdesc/section1.html
Evolution-deniers claim scientists are "abandoning" evolution because some scientists signed a statement saying they are skeptical that Darwinian evolution accounts for all the variation in the species. But (1) this doesn't mean those scientists believe it takes divine or non-natural intervention for evolution to happen, and (2) the list is a FRAUD:
http://www.youtube.com/watch?v=Ty1Bo6GmPqM
Not only that, but there are nearly 12,000 Christian CLERGY who've signed a statement supporting evolution and rejecting the teaching of creationism as science. Science isn't about voting, but even if it was, evolution still wins.
http://www.butler.edu/clergyproject/Christian_Clergy/ChrClergyLtr.htm
Evolution-deniers claim the fossil record does not support evolution, and that there are no intermediate species. This is an outright lie.
Professional evolution-deniers like Kent Hovind or Harun Yahya claim that a "transitional fossil" is some unworkable mutant like half-crocodile/half-duck or half-starfish/half-flounder. They paint these ridiculous pictures, then say "see! none exist!".
However, evolution doesn't work that way. Evolution works by tiny changes over a long time, so that species slowly morph into different species. When you grow from an infant to an adult, your left leg doesn't grow to full size first, then your right arm, then your head. Similary, evolution doesn't happen to make a whale's head on a cow's body.
Here is an "Old Earth Creationist" explaining about all sorts of intermediate species and how the fossil record absolutely supports evolution: http://www.youtube.com/watch?v=q9a-lFn4hqY
Here is an example of how scientists used evolutionary theory to predict a particular undiscovered species should exist, when it should have existed, and where to dig NOW to find a fossil of it. They went to that spot, and dug up not one, but five examples. What successful predictions has creation ever made?
http://tiktaalik.uchicago.edu/searching4Tik.html
And here are more examples of intermediate species. Are these mammal-like reptiles or reptile-like mammals? http://www.gcssepm.org/special/cuffey_05.htm
Evolution-deniers, unable to refute the actual theory of evolution, then say "evolution doesn't explain the creation of the first life or the creation of the universe." That is also dishonest, because the theory of evolution doesn't ATTEMPT to explain those. It has nothing to do with those. The birth of the universe is cosmology, not evolution. And non-life to life is abiogenesis. We don't YET know how abiogenesis happened, but we've got some good ideas:
http://www.youtube.com/watch?v=U6QYDdgP9eg
Evolution-deniers claim we've never SEEN evolution - that's a lie, because we have:
http://www.nytimes.com/20