In Idle Theory, all life is seen as attempting primarily to stay alive with minimal effort. The first photosynthetic plants discovered how to capture the abundant radiant energy of the sun. The first herbivores discovered an easier life tapping the energy stored in plants. The first predators discovered an idler existence by capturing the energy stored in herbivores. Multicellular life was more idle than unicellular life.
Human life is simply another variant form of life, that acts to minimize effort.
Human society, the division of labour, tools, ethical codes, laws, and trading systems have all acted to increase human idleness.