Bonobos

Does anyone ever wonder if bonobos are just the liberals of the chimpanzee community? For those of you who aren't up on your primatology, you can read about bonobos and their more patriarchal cousins the common chimpanzees on Wikipedia. What if a long time ago, bonobos and common chimps lived together, and the bonobos were the liberals of their society with the common chimps the conservatives. I remember in the early days of the Bush administration frustrated liberals would always joke about moving to Canda; what if bonobos did something similar? Sometime in the ancient past, some primitive liberal chimps said:

"We are tired of this conservative chimpanzee government. We are crossing the Congo River and not coming back."

These liberal chimps would later become the modern day bonobos. You don' t have to tell me this is an awesome idea, because I already know. Do you think something similar could happen in the human future? Do you think that different branches of society with different politics might be isolated from one another long enough for those politics to impact their biology?