Answer:
The differences that existed between the peace plans that had been built for World War I, and World War II, were, first, that after World War II, now all efforts needed to be focused on rebuilding torn up countries in almost all continents,whereas in World War I, there was an added need to apeace the suddenly arising threat of a new rebuilding Germany. The second is that now there was a world that was being divided and torn into two conflicting sides: communist Soviet Union, and the United States with its Western allies. So peaceful plans for rebuilding, after World War II, and peace plans, had to take into account the two conflicting, opposite pulling sides. And a third difference is that now, after World War II, a new reality was coming into play; the possibility that if new conflict arose, nuclear power would be used to the first time, as a fighting weapon.