Economist Russ Roberts declares,

Most of us know very little. The world is a complex place and it’s hard to know what is going on. So we grope around in the dark trying to make sense of what is happening and what explains what we observe. We manage to convince ourselves that we are seeking the truth and we have found it. … And subtlety is not our strong suit as human beings. We like simple stories without too much nuance.

So we manage to convince ourselves that the evidence speaks so loudly, so emphatically, that we have no choice but to declare our allegiance to a particular tribe as a result of that evidence. The red tribe. Or the blue one. Or the white one. Or the black one. It rarely crosses our minds to notice that causation is probably going the opposite direction—the tribe we are in determines the evidence we notice and accept.