Why did president roosevelt originally authorize the development of the atomic bomb?

He believed that Germany was trying to develop one, is the right answer.

Explanation:

President Franklin D. Roosevelt accepted a letter written by  Albert Einstein on 11th October 1939. In this letter, he explained a new area of physics that represented that uranium could share atomic fission with the resultant discharge of a surpassing amount of energy. His doubts about the very fact that Germany would have started the investigation in the same field and already checked the shipping of uranium from the mines of Czech in its newly gained territory, made Roosevelt worry. Therefore, Roosevelt approved the development of the atomic bomb because he believed that Germany was developing a similar weapon.

the revolution instituted a short-lived roman republic.

the ss was the main organization responsible for the genocidal murder of around six million people of european ethnic minorities, essentially jews, in the holocaust. the members of all its branches committed war crimes and crimes against humanity during the second world war (1939-1945). likewise, the ss were involved in commercial enterprises and exploited the inmates of the concentration camps as slave laborers.

the tortures and assassinations committed by the ss were the result of an ideology developed long before the armed conflict, this ideology was based on the racial supremacy of the germans over the rest.