Who is man? In my personal opinion, we will never be able to give exact answer. However, we can reduce the problem and to consider man from only biological point of view, e.g. as a biological being. Then, according to biological classification, man belongs to :

How humans evolved? The animation above gives an outline of that very long process. Read my summary of the basic stages of human evolution and you will easily understand the evolution timeline showed in the animation. Not all of the known hominid species are mentioned in the summary though, only main ones. However, if you visit my paleoanthropology links, you will have an opportunity to learn about human origins in much more details.