Any discussion about racial/genetic differences, especially when it comes to predisposition to crime, IQ, school test scores, etc. is a total and complete taboo. Any racial comments in general (see Donald Sterling). I can’t think of a bigger taboo than that.
Maybe less of a taboo:
– democracy (i.e. the ultimate social system that is desired by all people)
– homosexuality (i.e. orientation vs sexual disorder)
– support of Israel
– support of veterans
– money
– prop 13 in CA politics 😉
