I am not disagreeing with the diversity that Margaret suggests, but I might take issue with (as in, it still needs more attention) seeking out people who are different than us. This is a hugely over-simplified statement, because the example that she offered of the two who were collaborating together did not support such a view at all. The subtleties are critical. The two individuals working together were working toward a common cause -- to find the truth. They had a mutual respect for using evidence to guide them. They 'agreed' to approach this common cause from entirely different perspectives.

The main point is, there are a lot of people who are 'different' than us who would not be amenable to pursuing a common cause and being willing to do so from entirely different perspectives.