utopianism
noun /juːˈtəʊpiənɪzəm/
/juːˈtəʊpiənɪzəm/
(also Utopianism)
[uncountable]- the belief that everything can be perfect, often in a way that does not seem to be realistic or practical
- The utopianism of the '60s had given way to the street battles of the '70s.