"Whatever has a tendency to promote the civil intercourse of nations, by an exchange of benefits, is a subject as worthy of philosophy as of politics. Commerce is no other than the traffic of two individuals, multiplied on a scale of numbers; and by the same rule that nature intended the intercourse of two, she intended that of all. For this purpose she has distributed the materials of manufactures and commerce, in various and distant parts of a nation and of the world; and as they cannot be procured by war so cheaply or so commodiously as by commerce, she has rendered the latter the means of extirpating the former."
John Stuart Mill - On Liberty
"Human nature is not a machine to be built after a model, and set to do exactly the work prescribed for it, but a tree, which requires to grow and develop itself on all sides, according to the tendency of the inward forces which make it a living thing."