The UNIA peaked from 1918 to 1923 as the most formidable Black movement.

Evidence

Clearly, the UNIA possessed a substantial cadre and several tiers of secondary leadership. It was a complex organization functioning on a number of levels simultaneously. And its popular appeals and attractive political style were combined with pragmatic programs of racial achievement. For the five years of its peak development, from 1918 to 1923, it became the most formidable movement in the history of American Blacks. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 1014

Categorization

• corroborated: 3 independent passages support this claim — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 1014
• XREF: connects to: The UNIA briefly united an unprecedented and internally contradictory Black coalition — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 2233

Broader Connections

• The UNIA briefly united an unprecedented and internally contradictory Black coalition #expands (0.75) — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 2233