Nicholas Kristof has made these sorts of arguments before, but I think these are the sorts of things that are worth saying over and over again. ISIS and other groups of extremists and fundamentalists target girl's education because they know that's what most threatens their long term agenda. The US and others with political and humanitarian interests in the region should do the same, but in reverse: using weaponry in the short term, but investing in education, for young girls and women in particular, in the long term. Books, as Kristof says, are much cheaper than bombs, and probably more effective too.