Who created utopianism?

Utopianism, as a concept, can be traced back to various thinkers throughout history, but it is often attributed to Sir Thomas More, who coined the term in his 1516 book "Utopia." In this work, he described an ideal society on an imaginary island, presenting a vision of social and political perfection. Utopian ideas have since evolved, influenced by various philosophers and movements, but More's contribution laid the groundwork for future discussions on ideal societies.