… is from section IX of the posthumous 1836 edition of Thomas Malthus‘s 1820 Principles of Political Economy:
One of the greatest benefits which foreign commerce confers, and the reason why it has always appeared an almost necessary ingredient in the progress of wealth, is, its tendency to inspire new wants, to form new tastes, and to furnish fresh motives for industry. Even civilized and improved countries cannot afford to lose any of these motives.