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

The first map shows colonial powers and their holdings (1945). the second map shows human development worldwide. compare the two maps. what do the maps indicate about regions that gained independence in the second half of the twentieth century? they differ in their development patterns. they are as developed as their colonial powers. they are more developed than their colonial powers. they remain less developed than their colonial powers.

How did the atomic bomb end the war

Name at least three countries neaolpeon controlled