Harry Truman actually said...

All mankind now stands in the doorway to destruction--or upon the threshold of the greatest age in history.

Address in Columbus at a Conference of the Federal Council of Churches.

03/05/1946

More Harry Truman Quotes

He sought to establish an effective world organization.

While I am honored to accept this award, I do so not in my name but in the name of the people of the United States.

He urged us to lead the world in the search for a just and lasting peace.

And from that minute on I was a fan of Woodrow Wilson, who I think is one of the five or six great Presidents that this country has produced...