We live in an age of profound upheavals. Under the stimulus of technology, the tempo of historical evolution has been abruptly accelerated. In almost all fields, the old formulas are losing their value and we are forced to invent new ones. This phenomenon is particularly evident in the game of confrontation between human collectivities, where the changes have been so profound that players and observers find themselves baffled by the new and subtle forms of modern conflicts, just when important and urgent decisions must be made at every moment. The appearance of nuclear arms and the development of mechanized warfare on one hand, and the effectiveness of primitive forms of combat in the “wars of liberation” on the other, create a contradictory situation which seems so much the more without historical precedent that our notions about armed conflicts remain largely determined by the recent experiences of the two world wars. A radical revision of these notions is absolutely essential.