What was president Franklin d Roosevelt greatest contribution while the nation recovered from an economic disater and faced another potential war in europe

President Franklin D. Roosevelt's greatest contribution was the reformation of financial regulations.

Explanation:

Franklin D. Roosevelt was the 32nd President of the United States and the only one elected four times into that position.  He was first elected in November 1932.  He was in charge of the US throughout the second world war.

According to White House archives, FD Roosevelt brought "recovery to business and agriculture, relief to the unemployed and to those in danger of losing farms and homes."

He also reformed Social Security, imposed heavier taxes on the wealthy, introduced new controls over banks and public utilities, and introduced an enormous work relief program for the unemployed.

- "the past is made of multitudinous items ranging from anything that can be collected, recollected or assessed to originate in the past. as such, the past is a gallimaufry of particulars that may not have been related in any way. however, the human mind seeks organization to understand concepts and other things. the human mind therefore seeks relationships in explaining and studying the past. history being a humanity, dictates that historians have to serve this human trait by bringing structure to details of the past. historians do this by creating interpretive frameworks that capture as many details as possible."

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worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.