The article shows that perestroika has its origins in the many plans and diverse attempts to reform the Soviet system in the years between 1945 and 1984. In fact it now seems clear that certain members of the Soviet nomenklatura - a group which was gradually transmuting into a new bourgeoisie during this period - wanted from a very early stage to make the system less rigid : their projected reforms would, however, have left them in possession of the wealth and advantages which they had acquired. They would also have continued to be in control of society. Beria worked out an ambitious reform plan which Khrushchev partially adopted after having him shot and before being himself removed from power by a group which would succeed in resisting es...