You might be confusing Aniximander's musings about life coming from the sea (I cannot know, since you didn't elaborate), but to he has generally been shown by the evidence to be correct. If we want to stick to vertebrates, lobe finned fishes eventually colonized the land and amphibians, reptiles, dinosaurs, birds and mammals eventually evolved from those first colonists.
His musings, however, weren't very well evidenced and certainly were not an influencing factor in Darwin's formulation of the Theory, nor the 150 years of fossil and genetic evidence that have followed since he first published them. Anaximander was, at best, prescient, but not the inventor of evolutionary theory as it it studied today.
As far as the evidence for evolution goes... I'll let others pile on with links supporting it. I'd rather you first show a willingness to do your own research rather than provide bald assertions before I start doing your homework for you.