Helen Yaffe - As Minister of Industries in Cuba between 1961 and 1965, Che Guevara addressed the challenge of increasing production and labour productivity in conditions of underdevelopment and in transition to socialism, without relying on capitalist mechanisms that undermine the formation of new consciousness and social relations integral to socialism. Under capitalism, Guevara noted, competition for private profit drives the application of science and technology to industrial development, revolutionising the productive forces. Socialist governments must find alternative methods.