Ph.D.?

I keep wondering what I should do. The type of study that I truly want to do is more of a Ph.D. study. So I wonder, can I go from bachelors to Ph.D? I know some colleges let you. I don't know if union Institute allows this. I don't believe they do. If I went into a Ph.D I would study creativity. It is a big subject and relates to many things. I really want to go back into the research that I did 12 years ago and find out what is new. I have so many questions and feel like I am at a turning point. I guess this is the same place I was just a year ago, funny it feels like it has been much longer than that.