"Human wants and desires are countless in number and very various in kind: but they are generally limited and capable of being satisfied. The uncivilized man indeed has not many more than the brute animal; but every step in his progress upwards increases the variety of his needs together with the variety in his methods of satisfying them. He desires not merely larger quantities of the things he has been accustomed to consume, but better qualities of those things; he desires a greater choice of things, and things that will satisfy new wants growing up in him.
Thus though the brute and the savage alike have their preferences for choice morsels, neither of them cares much for variety for its own sake. As, however, man rises in civilization, as his mind becomes developed, and even his animal passions begin to associate themselves with mental activities, his wants become rapidly more subtle and more various; and in the minor details of life he begins to desire change for the sake of change, long before he has consciously escaped from the yoke of custom. The first great step in this direction comes with the art of making a fire: gradually he gets to accustom himself to many different kinds of food and drink cooked in many different ways; and before long monotony begins to become irksome to him, and he finds it a great hardship when accident compels him to live for a long time exclusively on one or two kinds of food."