Hewison succeeded William Kashtan as general secretary of the Communist Party of Canada in 1988 at a time when the Communist world was being convulsed by Mikhail Gorbachev's reforms in the Soviet Union.
Massie resigned from the Communist Party after its 1988 convention due to his opposition to the leadership of George Hewison.
Under the leadership of general secretary George Hewison (1988–92), the leadership of the CPC and a segment of its general membership began to abandon Marxism-Leninism as the basis of the Party's revolutionary perspective, and ultimately moved to liquidate the Party itself, seeking to replace it with a left, social democratic entity.
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