A book originally published in the 1990s is our attempt to answer the idea that socialism is dead and buried after the demise of the Soviet Union.The core of the book consists of a series of chapters spelling out what we believe would be efficient and democratic methods for planning a complex economy. We also examine issues of inequality and its elimination, systems of payment for labour, a democratic political constitution for a socialist commonwealth, the commune as a set of arrangements for living, and property relations under socialism. Since being published in English it has been translated into many other languages.