(2) Marshall Explanation: Malthus opposed what has come to be described as Say's Law: that supply creates its own demand. He rejected the proposition that the demand for commodities will automatically provide a motive for sufficient investment and production to satisfy such demand, or that investment and production would alone and automatically lead to an adequate demand to absorb supply. He argued that production and consumption were impelled by very different motives. Demand adjusted slowly, according to 'habit and tastes' and hence if productivity increased significantly, demand would not necessarily match supply and gluts of commodities might result.