 After the fall of the Berlin Wall there was an abrupt decline in Marxist philosophy. As intellectuals debated how best to reform the Mexican state, they began to read other foreign political philosophers, such as Weber, Arendt, Rawls, Bobbio and Habermas. Some of the philosophers who have focused on the nature of democracy, justice, and poverty include: Luis Aguilar Villanueva (b. 1938); Paulette Dieterlen (b. 1947), author of La pobreza: un estudio filosófico (2003); Luis Salazar (b. 1949); León Olivé (1950–2017); Griselda Gutiérrez (1951); María Pía Lara (b. 1954), author of Moral textures (1998); Ambrosio Velasco (b. 1954); Rodolfo Vázquez (b. 1956), author of Entre la libertad y la igualdad (2006); Mario Teodoro Ramírez (b. 1958), author of De la razón a la praxis (2003); and Enrique Serrano (b. 1958).