"Unemployment, hard times, were growing in 1914. Could guns divert attention and create some national consensus against an external enemy? It surely was a coincidence--the bombardment of Vera Cruz, the attack on the Ludlow colony. Or perhaps it was, as someone once described human history, "the natural selection of accidents." Perhaps the affair in Mexico was an instinctual response of the system for its own survival, to create a unity of fighting purpose among a people torn by internal conflict. The bombardment of Vera Cruz was a small incident. But in four months the First World War would begin in Europe."