In the beginning (1930's into the 1960's) there was logical positivism. And the philosophy of science was without form, and void; and darkness was upon the face of the deep.

Translation: In the early days the dominant conception of science entertained by philosophers and historians of the subject was that it proceeded gradually and methodically and that scientists were some of the most rational beings on the planet.

And Thomas Kuhn (and others such as Paul Feyerabend, Norwood Hanson and Stephen Toulmin) said, Let there be light: and behold there was light.

Translation: While there are periods of so-called normal science, a more careful examination reveals that it is also punctuated by periods of revolution. Not uncommonly, such upheavals are brought about by young upstarts who insist upon focusing attention (often to the dismay of the old farts) on discrepancies (referred to as anomalies) which either have been overlooked or which cannot be accommodated by the current scientific world view (referred to as a paradigm). During these episodes, the conflict between the upstarts and the defenders of the status quo (referred to as a paradigm conflict) can, at times, take on the appearance of a bar brawl or a food fight.