Historical revisionism arrived when West Indian historian Eric Williams, a Marxist, in "Capitalism and Slavery" (1944), rejected this moral explanation and argued that abolition was now more profitable, for a century of sugarcane raising had exhausted the soil of the islands, and the plantations had become unprofitable. It was more profitable to sell the slaves to the government than to keep up operations. The 1807 prohibition of the international trade, Williams argued, prevented French expansion on other islands. Meanwhile, British investors turned to Asia, where labor was so plentiful that slavery was unnecessary. Williams went on to argue that slavery played a major role in making Britain prosperous. The high profits from the slave trade, he said, helped finance the Industrial Revolution. Britain enjoyed prosperity because of the capital gained from the unpaid work of slaves.