Were the Nuremberg Trials Legal?

The first international war-crimes trials began in November 1945 in Nuremberg, Germany. The International Military Tribunal (IMT) was set up by the victorious Allies (the U.S., France, Great Britain and the Soviet Union) at the end of World War II. Prosecutors from those four countries indicted a total of 22 Nazi German officials on three basic charges - conspiring and ultimately launching an "aggressive war," committing war crimes and committing "crimes against humanity." Also indicted were …

…as those with which the accused were charged. Contrary to the fundamental laws under which this society has lived for many hundreds of years, the law officers in this trial did not attempt to justify their action on any legal ground, yet rested their stance on the fact that in their opinion, the parties convicted were guilty. Some may ask, can this decision really be justified by any lines of reasoning, I say, absolutely not.