What is TS Eliot's contribution to modern poetry?

T.S. Eliot's poem "The Love Song of J. Alfred Prufock" (1915) is considered the masterpiece of Modernistic poetry. Eliot's poem makes use of stream of consciousness, a characteristic of Modernism, to relay the thoughts of the narrator. Prufrock is an outdated man, who laments his inability to grow spiritually and physically, and he especially laments his inability to cardinally engage a woman.

I suggest you read articles on Modernist poetry, and then read Eliot's poem. Modernists believed that traditional, outdated views of life could not keep up with the new industrial world.