- For I dipt into the future, far as human eye could see,
Saw a Vision of the world, and all the wonder that would be;.
- Till the war-drum throbb’d no longer, and the battle-flags were furled
In the Parliament of man, the Federation of the world.
- There the common sense of most shall hold.
a fretful realm in awe,
And the kindly earth shall slumber, lapt in universal law.
- Alfred, Lord Tennyson, Locksley Hall, (1842).
In my opinion the only salvation for civilization and the human race lies in the creation of a world government, with security of nations founded upon law. As long as sovereign states continue to have separate armaments and armament secrets, new world wars will be inevitable.
Albert Einstein 
There can be little question that the attainment of a federation of all humanity, together with a sufficient measure of social justice, to ensure health, education, and a rough measure of equality of opportunity to most of the children born into the world, would mean such a release and increase of human energy as to open a new phase in human history
H.G. Wells 
History is now choosing the founders of the World Federation. Any person who can be among that number and fails to do so has lost the noblest opportunity of a lifetime.
Carl Van Doren 
There is no salvation for civilization, or even the human race, other than the creation of a world government.
Albert Einstein .
- It is obvious that no difficulty in the way of world government can match the danger of a world without it.
- Carl Van Doren, The Great Rehearsal (1948)
There is an increasing awareness of the need for some form of global government.
Mikhail Gorbachev 
It will be just as easy for nations to get along in a republic of the world as it is for you to get along in the republic of the United States. [If] Kansas and Colorado have a quarrel over the water in the Arkansas river they don't call out the national guard in each state and go to war over it. They bring suit in the Supreme Court of the United States and abide by the decision. There isn't a reason in the world why we can't do that internationally.
Harry S. Truman 
I believe at some future day, the nations of the earth will agree on some sort of congress which will take cognizance of international questions of difficulty and whose decisions will be as binding as the decisions of the Supreme Court are upon us.
Ulysses S. Grant 
- We shall have world government, whether or not we like it. The question is only whether world government will be achieved by consent or by conquest.
- James Paul Warburg, testimony to U.S. Senate Committee on Foreign Relations on 1950 Feb 17
"To achieve world government, it is necessary to remove from the minds of men their individualism, loyalty to family tradition, national patriotism, and religious dogmas."
George Brock Chisholm, Psychiatry (1946).