I agree, there is some much needed grammatical editing for this page, and possibly a complete re-haul. The different sections do not make much sense as they are, and most of the sentence structures are somewhat confusing.  

 For the sexual selection subject, I do not feel that it should be removed from the page, because I believe that a comparison between ecological and sexual selection is necessary to understand ecological selection. Sexual selection is not a separate regime entirely from natural selection, but actually a mode of natural selection. Ecological selection is often explained as a cause of change, making it a mechanism of natural selection, but this is argued by many, so I feel that it should be described in terms of all arguments. This means that references should be added, so I definitely agree with that point. The arguments presented need support, and they to be contrasted with other arguments.