“Mankind which began in a cave and behind a windbreak will end in the disease-soaked ruins of a slum.”

When asked by Viereck if he considered himself to be a German or a Jew. A version with slightly different wording is quoted in Einstein: His Life and Universe http://books.google.com/books?id=dJMpQagbz_gC&lpg=PP1&pg=PA386#v=onepage&q&f=false by Walter Isaacson (2007), p. 386
1920s, Viereck interview (1929)
Variant: Nationalism is an infantile disease. It is the measles of mankind.
Context: It is quite possible to be both. I look upon myself as a man. Nationalism is an infantile disease. It is the measles of mankind.

I Don't Know, written by Ozzy Osbourne, Randy Rhoads and Bob Daisley
Song lyrics, Blizzard of Ozz (1980)

Source: Exploration of Space (1952)

1961, UN speech
Context: Mankind must put an end to war — or war will put an end to mankind.
So let us here resolve that Dag Hammarskjold did not live, or die, in vain. Let us call a truce to terror. Let us invoke the blessings of peace. And as we build an international capacity to keep peace, let us join in dismantling the national capacity to wage war.
Context: We meet in an hour of grief and challenge. Dag Hammarskjold is dead. But the United Nations lives. His tragedy is deep in our hearts, but the task for which he died is at the top of our agenda. A noble servant of peace is gone. But the quest for peace lies before us.
The problem is not the death of one man — the problem is the life of this organization. It will either grow to meet the challenges of our age, or it will be gone with the wind, without influence, without force, without respect. Were we to let it die, to enfeeble its vigor, to cripple its powers, we would condemn our future. For in the development of this organization rests the only true alternative to war — and war appeals no longer as a rational alternative. Unconditional war can no longer lead to unconditional victory. It can no longer serve to settle disputes. It can no longer concern the great powers alone. For a nuclear disaster, spread by wind and water and fear, could well engulf the great and the small, the rich and the poor, the committed and the uncommitted alike. Mankind must put an end to war — or war will put an end to mankind.
So let us here resolve that Dag Hammarskjold did not live, or die, in vain. Let us call a truce to terror. Let us invoke the blessings of peace. And as we build an international capacity to keep peace, let us join in dismantling the national capacity to wage war.

As quoted by Mussolini in 2000 Years of Disbelief: Famous People with the Courage to Doubt by James A. Haught (1966) p. 256. From a speech he made in Lausanne, July 1904.
1900s

“Is it ‘Moran’ or ‘Moron’?” http://www.ilanamercer.com/phprunner/public_article_list_view.php?editid1=552 WorldNetDaily.com, May 28, 2010].
2010s, 2010

Source: As We Go Marching (1944), p. 111

Source: The Magus