Then there's this politically-incorrect one by Kipling. He wrote it in 1899 to urge the U.S. to assume the task of developing and civilizing the Phillipines.

I think it's real relevant in terms of what we're doing in Iraq and Afghanistan now, and the help we've tried to give to many other third-world countries in the last 60 years. The resistance of uncivilized people to civilization is something that really never changes.

The White Man's Burden by Rudyard Kipling

Take up the White Man's burden -
Send forth the best ye breed -
Go bind your sons to exile
To serve your captives' need;
To wait in heavy harness,
On fluttered folk and wild -
Your new-caught, sullen peoples,
Half-devil and half-child.

Take up the White Man's burden -
In patience to abide,
To veil the threat of terror
And check the show of pride;
By open speech and simple,
An hundred times made plain
To seek another's profit,
And work another's gain.

Take up the White Man's burden -
The savage wars of peace -
Fill full the mouth of Famine
And bid the sickness cease;
And when your goal is nearest
The end for others sought,
Watch sloth and heathen Folly
Bring all your hopes to nought.

Take up the White Man's burden -
No tawdry rule of kings,
But toil of serf and sweeper -
The tale of common things.
The ports ye shall not enter,
The roads ye shall not tread,
Go mark them with your living,
And mark them with your dead.

Take up the White Man's burden -
And reap his old reward:
The blame of those ye better,
The hate of those ye guard -
The cry of hosts ye humour
(Ah, slowly!) toward the light: -
"Why brought he us from bondage,
Our loved Egyptian night?"

Take up the White Man's burden -
Ye dare not stoop to less -
Nor call too loud on Freedom
To cloke your weariness;
By all ye cry or whisper,
By all ye leave or do,
The silent, sullen peoples
Shall weigh your gods and you.

Take up the White Man's burden -
Have done with childish days -
The lightly proferred laurel,
The easy, ungrudged praise.
Comes now, to search your manhood
Through all the thankless years
Cold, edged with dear-bought wisdom,
The judgment of your peers!