Nihilist;
someone who rejects all theories of morality or religious belief
anarchist: an advocate of anarchism
wordnet.princeton.edu/perl/webwn
The Nihilist movement was an 1860s Russian cultural movement marked by the questioning of the validity of all forms of preconceived ideas and social norms. The Nihilists championed the independence of the individual and shocked the Russian establishment. Those ideas had a political impact, as they opposed servitude and demanded democratic reforms. ...
en.wikipedia.org/wiki/Nihilist
Shalom!