We are living in times when the structures involving the global financial system, national security, and self-governance are under attack, decaying, or just self-destructing due to all the ills to which humanity is prone.
Wars in the twentieth century were always an example of either the failure of nations to resolve their differences or of the ancient human inclination to steal whatever they can from their neighbor. Wars organize this into armies for that purpose. The other cause for war is the necessity to rid the neighborhood of the crazy guy who’s hoarding weapons and building bombs.