-shəˌnizəm noun
( -s )
1. : a belief in perfectibility: as
a. : the ethical doctrine that self-realization or the perfection of moral character constitutes man's highest good
b. : the theological doctrine that a state of freedom from sin is attainable or has been attained in the earthly life
c. usually capitalized : the utopian principles governing the 19th century Christian communist community at Oneida, N.Y.
2. : a disposition to regard anything short of perfection as unacceptable
perfectionism no less than isolationism … may obstruct the paths to international peace — F.D.Roosevelt