Humans had invented the karma theory due to their own emotional concerns in order to expect 'retribution to pay back' when they could not rely on their own ability to punish 'evildoers' in revenge, which in essence was merely a kind of spiritual triumphalism, three-dimensional There is no omniscient, omnipotent being in the worldview, let alone a 'god' who would punish the wicked for the sake of a small human being.