Discipline: Political Science
A theory of the manner in which governments make decisions.
Policies are changed bit by bit in response to changing circumstances, rather than as the result of grand plans or wide-ranging rational calculations. Those who fear change see incrementalism as a slippery slope to disaster; those who want revolution view it as an impediment to progress.
Also see: conservatism
C E Lindblom, Politics and Markets (New York, 1977)