According to General Williams, how did Belgium gain access to the lands in the Congo?

Why is it useful for historians to base certain studies on the analysis of historical themes

How has u.s. participation in international economic development efforts affected other countries? o a. it has made some countries decide they no longer want close ties with the united states. b. it has ended diplomatic ties with countries that refuse to participate. c. it has raised money to poor nations grow their economies. d. it has caused the united states to intervene militarily to stop human rights abuses.

Who was the leader of the black nationalists in the 1920s?