"“What are the motives which prompt men to new enterprises? First, money, which in a sense comprises, includes, all of the other motives too. But for the sake of clarity, call this first, the desire for money, and end in itself. Second, there’s the will for power. Subdivide that last into, say, the crusading instinct and call it a desire for unlimited sexual opportunity. Power over women. Then third, curiosity, the desire to know. Fourth, the enterprise for its own sake, as a diversion. Like a millionaire’s race horses. Fifth, philanthropy. Any more?” “Covers it,” said Zaer."
January 1, 1970
https://en.wikiquote.org/wiki/Jack_Vance