Once you educate the boys, they tend to leave the villages and go search for work in the cities, but the girls stay home, become leaders in the community, and pass on what they've learned. If you really want to change a culture, to empower women, improve basic hygiene and health care, and fight high rates of infant mortality, the answer is to educate girls.

Certainly I am sometimes afraid, but my hope is greater than my fear, and the biggest enemy we all face is ignorance which breeds hatred, whether it be in America, or Afghanistan, or anywhere. We owe it to our children that we may give them all a legacy of peace, but it will take courage and compassion.

The tune was too ingrained for Mortenson to consider the novelty of this moment- an American, lost in Pakistan, singing a German hymn in Swahili.

I'm no military expert, and these figures might not be exactly right,' I said. 'But as best I can tell, we've launched 114 Tomahawk cruise missiles into Afghanistan so far. Now take the cost of one of those missiles, tipped with a Raytheon guidance system, which I think is about $840,000. For that much money, you could build dozens of schools that could provide tens of thousands of students with a balanced, non extremist education over the course of a generation. Which do you think will make us more secure?

The Koran and Islam is about submission, justice and compassion. All people of the "book" - which means the Torah, Koran and Bible are accorded equal respect under Islam.

If you teach a boy, you educate an individual; but if you teach a girl, you educate a community.

In tribal society, the most important thing to do when civilians are killed in a skirmish is to acknowledge the deaths, and provide compensation. When tribal clans fight, the victor is required to take care of the vanquished widows and orphans, which puts a limitation on bloodshed, and tempers warring groups to try and negotiate a compromise.