"...[T]he biggest challenge the United States faces today is not a looming great-power rival; it is the triple whammy of accumulated debt, eroding infrastructure and a sluggish economy. The only way to have the world's most capable military forces both now and into the future is to have the world's most advanced economy, and that means having better schools, the best universities, a scientific establishment that is second to none, and a national infrastructure that enhances productivity and dazzles those who visit from abroad. These things all cost money, of course, but they would do far more to safeguard our long-term security than spending a lot of blood and treasure determining who should run Afghanistan, Kosovo, South Sudan, Libya, Yemen or any number of other strategic backwaters."

"...[I]t is hard not to see echoes of Nixon's decision to invade Cambodia in 1970, in a failed attempt to eradicate Viet Cong bases there. The two situations are hardly identical, but both illustrate the tendency for wars to expand in both the scope and extent of violence, especially when they aren't going well. You send more troops, but that doesn't turn things around. So you send a few more, and you widen the war to new areas. But that doesn't work either, so you decide you have to alter the rules of engagement, use more missiles, bombs, or drones, or whatever."