In his Principle of Least Effort Zipf makes great contributions to spatial thinking. His use and understanding of space was assimilated into everyday psychology. His Principle of Least Effort says that it is human nature to want the greatest outcome for the least amount of work. Zipf showed that useful behaviors are performed frequently. Frequent behaviors become quicker and easier to perform over time. The very existence of these quick, easy behavior patterns cause individuals to choose them, even when they aren’t necessarily the wisest, or even most logical choice.