What links them is their common connection to Emerson (a passage from whom Whitman printed on the second edition of Leaves of Grass), and the daring originality of their visions.
The development of these idioms, as well as more conservative reactions against them, can be traced through the works of poets such as Edwin Arlington Robinson (1869-1935), Stephen Crane (1871-1900), Robert Frost (1874-1963) and Carl Sandburg (1878-1967).