Actually, plenty of cultures have explicit definitions for what is right
versus what is wrong
. They are called laws
, and are generally founded upon abstract principles
Also, in order to 'not believe in right and wrong in the traditional sense', one has to implicitly acknowledge that, somewhere, there is a 'traditional sense', however vague.
Generally, human cultures are themselves formed upon little more than overlapping individual conceptions of right
and of wrong
; that's what the Rousseauian social contract
However, one does have the right to violate these implicit contracts with his or her neighbors on principle; this is called Civil Disobedience
, which was practiced by Ghandi
and Martin Luther King, Jr.