The arbitrary nature of such distinctions is the hallmark of Darwinism. I realize this thread's title (the c-word) gives away its hidden agenda, but is species essentialism making a comeback? Can't we give our inquisitive friend a lesson in the Tree of Life?
Actually, I thought my user name made it quite clear where I am coming from. I make no secret that I "believe", however, I put inquisitive in my name because I am here to learn. I was very excited to find this forum because it's a great resource, and is full of people more learned than I am. My mind is open, and I am here to explore the evidence. I don't find scientific evidence threatening to my beliefs in the least. I LOVE learning, and being given things to mull over.
Some other users already pointed me in the direction of very comprehensive reading material (some of which is admittedly a little beyond my grasp), so again, I thank them.
If you see my posts in the future, I would appreciate it if you take them at face value, since again, I am here to learn, and am not ashamed to admit that I know very little about the subject (hence the fact that you won't see me posting much, except to pose questions for more information).
Now...another question...what is species essentialism?