"the amount of labour they contribute to society" . "each according to his contribution" . . "one's contribution" . "ranked according to his or her capacities and rewarded according to his or her work" . "To each according to his contribution" . . "contribution" . . "individual contributions" . "full product of their labor" . . "From each according to his ability, to each according to his contribution" . . "individual contributions to the social product" . . "to each according to his work" . "from each according to his ability, to each according to his work" . . . . "work each individual completes" . . . "To each according to his contribution" . "to each according to his contribution" .