A single-party state is a political system in which one political party controls the government and prohibits the formation of opposition parties. This concentration of political power often leads to limited political pluralism and restricted civil liberties. In single-party states, the ruling party typically dictates the political agenda and suppresses dissent to maintain control. Examples include nations like North Korea and Cuba. Citizens often have little to no say in the electoral process, and political opposition is frequently met with harsh repercussions, limiting democratic freedoms.