Abraham Maslow1908–1970When the only tool you own is a hammer, every problem begins to resemble a nail.
- “A Theory of Human Motivation”, in Psychological Review, vol. 50, no. 4 (1943), p. 382
- The Psychology of Science: A Reconnaissance (1966), ch. 2, p. 15
- The Farther Reaches of Human Nature (1971)
