Brian Faehndrich Posted over 3 years ago is the most inportant thing in this word psychology? Hi Debra, I agree with all you have said. My comment was more of a response to the topic question. Is psychology THE most important thing... my answer is no and in fact it is rivaled by equally (possibly (in the future) more) important discovery from other disciplines. No doubt study of human behavior is important, just the question is a bit over the top. Probably designed to spark just this type of discussion.