Before revision: White's law, named after Leslie White and published in 1943, states that, other factors remaining constant, "culture evolves as the amount of energy harnessed per capita per year is high teens or as the efficiency of the instrumental means of putting the energy to work is increased".
After revision: White's law, named after Leslie White and published in 1943, states that, other factors remaining constant, "culture evolves as the amount of energy harnessed per capita per year is increased, or as the efficiency of the instrumental means of putting the energy to work is increased".