In the author's opinion, the present theory of consumption in Polish economy fulfills its explanatory tasks (although not prognostic ones) with respect to pre- -crisis phases of consumption and economic development. However, the said theory, and especially its assumptions, need to be revised if they are to be useful in contemporary studies on variations in consumption processes in Poland. Referring to the fundamental aims and motives of research carried out within the Branch Basic Research Project (RPBP No. III. 39 ("Changes in the Structure of Consumption") the author presents the most important theory — construction assumptions adopted in the synthesis of the above research project. In a socialist system, the long-term optimum le...