Which important principle was established as a result of the nuremberg trials?

The important principle that was established as a result of the Nuremberg trials was that individuals could be punished including national leaders for war crimes against humanity. The Nuremberg trials were a number of trials that were held by the Allied forces after World War II against the prominent military and national leaders of Nazi Germany.

I believe the answer is: individuals could be punished including national leaders for war crimes against humanity.

The nuremberg trials was held in order to bring justice to the nazi war criminals that played huge roles in the world war II.

In this trial, many national leaders was convicted regardless of how high their influence was in their perspective countries.