Rationalism is a philosophical position, theory, or view that reason is the source of knowledge. Rationalism may also refer to: Rationalism (architecture), a term applied to a number of architectural movements Rationalism (international relations), a political perspective on the international system Rationalism (theology), philosophical Rationalism applied in theology Critical rationalism, an epistemological philosophy advanced by Karl Raimund Popper Economic rationalism, an Australian term in discussion of microeconomic policy Pancritical rationalism, a theory by William Warren Bartley developed from panrationalism and critical rationalism See also Rational (disambiguation) Rationale (disambiguation) Rationality Rationalization (disambiguation)