The Mexican Revolution deserves to be included among the world’s ‘great’ or ‘social’ revolutions for the scale of the fighting, the intense popular mobilization it involved, and the changes it brought about. The outcome profoundly affected Mexico politically, socially, economically, and culturally. The Introduction explains that the Revolution is seen as the work of a generation (1910–40) who first destroyed the old regime, then built a new state apparatus, and, finally, carried through social reforms unprecedented in Latin America at the time. The opposing views of the Revolution are also explained: the old orthodoxy that sees the Revolution as popular, progressive, and patriotic, and the revisionist and post-revisionist interpretations.