I think researchers are very.... They have a lot of ingenuity, and they do collaborate if they can. That is core to advancing knowledge. It's a question of whether it's knowledge in the purpose of a larger goal or not. There may be some initiatives that you want to move forward on that require a greater collective action than individual researchers can achieve on their own.
If I may, one other thing that you can also have is this: There are some researchers who don't fit nicely into a discipline. They're actually people who will ask, “Am I a health researcher, a natural science researcher or a social science researcher?” Those distinctions don't necessarily matter as much as the quality of the research.