The construction of dams in the Western Ghats and their perceived
effect on the seasonal circulation and cooling of the sea as described
at the end of Chapter 6 is a conceptual change that signifies an
extension of the domain of human action and, conversely, an
intervention of what is innate to the environment or 'natural'. With
the world changed so profoundly and human-environment relations
redefined, must not the fishermen's knowledge follow suit and be
thoroughly transformed" The situation reminds one of Thomas Kuhn's
(1962) concept of the historical development of science, in which
periods of 'normal' science, characterised by problem-solving within
the framework of an established paradigm1, are interspersed by
scientific revolutions in which a new paradigm is eventually adopted.
Different paradigms are mutually incommensurable, there being no common
language into which both can be translated without a loss of meaning.
After a revolution, scientists live in a different world, writes Kuhn,
and he describes the adherents of different paradigms as native
speakers of different languages (1962: Chapter 10).