Albert Einstein published his special theory of relativity in 1905, demonstrating that space and time are not absolute but relative to observers' motion, and that mass and energy are interchangeable (E=mc²). This theory overturned Newtonian physics' assumptions about fixed space and time, showing they form a unified spacetime continuum. Einstein's work initiated modern physics' revolutionary reconceptualization of reality's fundamental nature.

Relativity theory influenced modernist poetry's fragmentation and multiple perspectives, with poets like Ezra Pound and T.S. Eliot abandoning single viewpoints for collage-like structures. The dissolution of absolute time and space resonated with literary experiments in stream-of-consciousness and non-linear narrative. Einstein's equations suggested reality was stranger than perception indicated, encouraging poets to question surface appearances and explore deeper, counterintuitive truths. Modern and contemporary poetry continues engaging with quantum and relativistic concepts to express uncertainty, interconnectedness, and reality's elusive nature.