nihilism

noun

1 he could not accept Bacon's nihilism, his insistence that man is a futile being:

negativity, cynicism, pessimism;

rejection, repudiation, renunciation, denial, abnegation;

disbelief, non-belief, unbelief, scepticism, lack of conviction, absence of moral values, agnosticism, atheism, non-theism.

2 the roots of this decline lay deep in the moral nihilism of the 1960s:

anarchy, disorder, chaos, absence of government, lawlessness, mobocracy.

nihilism Oxford Dictionary of English