By dualism, I’m referring to the tendency of seeing two sides of an issue that appears to be connected yet different. This has been described as dualism, dialectic, etc, by various sources.
For instance, the tendency to see good and evil as two importance opposing forces; the historical East Asian philosophy of seeing the world in terms of “yin” and “yang”, etc.
There seems to be no strong reason to think of the world as naturally exhibiting dualism. However, people —- and especially those in history —- often tend to perceive dualism.
Are there any psychological or neurological findings that can shed light on this phenomenon?