Formalism was an aesthetic literary theory that emerged in the early 20th century as a reaction against romanticism and Marxism. It focused on analyzing the formal elements of a work of art, such as rhythm, meter, and syntax, rather than its historical context or political message. The theory originated in Russia and flourished there from 1910-1920 before spreading to other countries. Formalism held that meaning is derived from a work's formal qualities and that form and content are inseparable. Key thinkers included Russian formalists like Viktor Shklovsky and Boris Eichenbaum who analyzed devices that make literature seem strange or unfamiliar.