human nature

This term refers to the innate dispositions and universal tendencies of the human species. It is typically used in philosophical, psychological, or sociological discussions to explain why people behave in certain ways regardless of their individual personality or cultural background.

As an uncountable noun, it does not have a plural form and cannot be used with a count marker. One does not refer to "human natures" when discussing the species; instead, it is treated as a singular, collective concept.