REVISIONISM

re ‧ vi ‧ sion ‧ is ‧ m /rɪˈvɪʒ ə nɪz ə m/ BrE AmE noun [uncountable]

ideas which are changing away from the main beliefs of a political system, especially a Marxist system

—revisionist adjective :

revisionist writings

—revisionist noun [countable]