Critical race theory
According to University of Edinburgh philosophy professor, Tommy J. Curry, by 2009, many agreed with CRT's idea that race was socially constructed, not "biologically grounded and natural." "Social construct" means that even though how much dark pigment different people have in their skin is a real thing, and which continent their ancestors came from is a real thing, whether or not those facts are important is made up by society.  For example, money is a social construct.  A round piece of metal is real.  A piece of paper with ink on it is real.  But societies decide whether the metal is a coin and whether the paper is paper money.