Why did the movement collapse so quickly when Garvey was removed from the picture? Weren’t the ideas he espoused valid enough to keep the movement going without him?

The company's collapse was detailed in an essay by black intellectual W. E. B. Du Bois, who cast doubt on Garvey's trustworthiness and suspicion on UNIA's overall program. The main economic venture of Marcus Garvey was the Black Star Line.

Explanation:

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.

d) he bring down boss tweed and tammany hall.