It is a system that uses the bodys instinctual neuromuscular mechanisms. In plain English that means your natural reactions. All humans are hard wired from birth to react in a certain way under any given situation and Krav Maga uses such mechanisms to devastating effect. The simplicity of the system means that Krav Maga has the steepest learning curve out of any combat system. Its a military system that requires soldiers to be highly proficient in the shortest possible time in a battle situation not to score points, get a submission or tap out, but to actually make sure he/she gets to take another breathe and stay alive.
Born out of necessity to survive not recreational pursuits.
Parts 1-5 of the Fight Quest Krav Maga episode below: