Why was Einstein was so concerned with an atomic bomb being made?

Explanation: It is because he didn't want people to over use, abuse the atomic bomb. Because it is a heavy explosion that may kill hundreds of thousands of people.

Ithink the correct answer from the choices listed above is the third option. the primary source document that could a historian understand why the us civil war started is a charleston mercury editorial published in 1860 because it contains factual accounts of the events during that time. hope this answers the question.