 Another general challenge for historicists and others concerned with the rationality of science is how to factor the division of labor in science into a model of scientific rationality. How does individual rationality (the traditional focus of economists as well as philosophers) relate to the collective rationality of working groups or entire specialist communities? (See Sarkar 1983; Kitcher 1993; Mirowski 1996; Downes 2001; De Langhe 2014b; Latour 1987 and later for his actor-network theory; and the entry on  social epistemology.)  Feminist philosophers such as Longino (1990, 2001) and Solomon (2001) have proposed more thoroughgoing social epistemologies of science that go beyond the problem of division of labor, which, in their view, is still often treated individualistically.