What best describes the significance of the PR in Mexican history?

PR (Partido Revolucionario) was a political party in Mexico known for its dominant role in Mexican politics from the 1920s to the late 20th century. The PR played a key role in consolidating power after the Mexican Revolution and implementing social reforms in areas such as land redistribution and labor rights. Its influence waned in the late 20th century as Mexico transitioned to a more competitive political system.