Harry Truman 1946 Nuremberg Trials, UN & Universal Declaration of Human Rights. w. Ralph Richardson

A Time To Remember with Ralph Richardson - under FAIR USE
Harry Truman speech in San Francisco on formation of the United Nations

The United Nations have also had experience, even while the fighting was still going on, in reaching economic agreements for times of peace. What was done on the subject of relief at Atlantic City, food at Hot Springs, finance at Bretton Woods, aviation at Chicago, was a fair test of what can be done by nations determined to live cooperatively in a world where they cannot live peacefully any other way.
What you have accomplished in San Francisco shows how well these lessons of military and economic cooperation have been learned. You have created a great instrument for peace and security and human progress in the world.
The world must now use it!
If we fail to use it, we shall betray all those who have died in order that we might meet here in freedom and safety to create it.
If we seek to use it selfishly--for the advantage of any one nation or any small group of nations--we shall be equally guilty of that betrayal.
The successful use of this instrument will require the united will and firm determination of the free peoples who have created it. The job will tax the moral strength and fibre of us all.
We all have to recognize-no matter how great our strength--that we must deny ourselves the license to do always as we please. No one nation, no regional group, can or should expect, any special privilege which harms any other nation. If any nation would keep security for itself, it must be ready and willing to share security with all. That is the price which each nation will have to pay for world peace. Unless we are all willing to pay that price, no organization for world peace can accomplish its purpose.
And what a reasonable price that is!
Out of this conflict have come powerful military nations, now fully trained and equipped for war. But they have no right to dominate the world. It is rather the duty of these powerful nations to assume the responsibility for leadership toward a world of peace. That is why we have here resolved that power and strength shall be used not to wage war, but to keep the world at peace, and free from the fear of war.
By their own example the strong nations of the world should lead the way to international justice. That principle of justice is the foundation stone of this Charter. That principle is the guiding spirit by which it must be carried out--not by words alone but by continued concrete acts of good will.
There is a time for making plans--and there is a time for action. The time for action is now! Let us, therefore, each in his own nation and according to its own way, seek immediate approval of this Charter-and make it a living thing.

https://www.presidency.ucsb.edu/documents/address-san-francisco-the-closing-session-the-united-nations-conference