Physicalism

After doing the reading and listening to the lecture on both Descartes theory of dualism and the theory of physicalism, I side more with the belief of physicalism. It just makes the most sense that there is only one physical-material substance. I really truly believe this is the only thing we need to explain our own mental abilities. Simply based upon my small knowledge of how the human brain operates, physicalism seems the more rational theory. I also think dualism comes with too many problems. The problems with where and how the interactions occur and take place and the other dilemmas that come with dualism. The self has to be identical to the activities of the body or the brain. Mental states are identical to brain events. I really don't see how there can be disagreement with physicalism when dualism presents so many more obvious problems. I realize there are things in our mental life that are nothing like those of our physical life, and I guess I am not sure how exactly to explain that. I feel as if they are somehow tied in. I think that if we mentally feel guilty, maybe it is possible to physically feel guilty as well? Maybe all of the mental states are physical states too? I guess I'm still pondering this one...