Madness, a label that is applied to others where dislike and general perception of insanity are involved. Yet this is not quite accurate as only the truly insane deserve to be called mad.
Perspective, on the other side of the fence we reflect. The herding culture that humans have developed might also be described as insanity but we may label this a generally acceptable behaviour and consensus. Even if the direction is shrouded in madness.
Rash and illogical decisions are subjective and sometimes may be misunderstood. So we might say that the basis of madness is a deeper understanding of the human psyche.