David Kilcullen knows a thing or two about counter-insurgency.

A former lieutenant-colonel in the Australian army and a senior adviser to U.S. General David Petraeus, he helped shape the “surge” policy that is widely credited with pulling Iraq back from the brink of chaos. He has just written a book entitled “The Accidental Guerrilla: fighting small wars in the midst of a big one” which closely examines insurgencies from Thailand and Indonesia to Afghanistan and Iraq, including what it takes to contain and quell them.