<Li> religious believers; </Li> <Li> citizens inconvenient to the authorities . </Li> <P> The advocates of human rights and democratization, according to Bloch and Reddaway, made up about half the dissidents repressed by means of psychiatry . Nationalists made up about one - tenth of the dissident population dealt with psychiatrically . Would - be emigrants constituted about one - fifth of dissidents victimized by means of psychiatry . People detained only because of their religious activity made up about fifteen per cent of dissident - patients . Citizens inconvenient to the authorities because of their "obdurate" complaints about bureaucratic excesses and abuses accounted for about five per cent of dissidents subject to psychiatric abuse . </P> <P> In 1985, Peter Reddaway and Sidney Bloch provided documented data on some five hundred cases in their book Soviet Psychiatric Abuse . </P>

Who maintained control of the soviet union by killing and imprisoning his political enemies