1. Not always, historically, a source of economic growth; it was often the source of economic stagnation in areas where it was not increasing the rate of surplus capital formation;Bunker,1969
2. Only possible with large-scale exploitation of labour (Marx;Wallerstein,1967
3. Les tortueux sentiers du capital
4. A phenomenon wholly dependent upon its historical antecedents in the form of 'agricultural revolutions' and the resultant transformations in town-country relations (Marx;Hornborg;Harvey,1967