Nature Does Not Leap- Natura non facit saltus

The principle expresses the idea that natural things and properties change gradually, rather than suddenly

Natura non facit saltus (Latin for "nature does not make jumps") has been a principle of natural philosophy since at least Aristotle's time.It appears as an axiom in the works of Gottfried Leibniz (New Essays, IV, 16) and Isaac Newton, the co-inventors of the infinitesimal calculus,see Law of Continuity. It is also an essential element of Charles Darwin's treatment of natural selection in his Origin of Species.The phrase comes from Linnaeus' Philosophia Botanica.

It is also true in economics. Change is gradual and slow in economic behavior.