Final answer:
One-party systems are associated with non-democratic regimes where a single party controls the government with little to no political competition, and are often found in countries with restrictions on individual liberties.
Step-by-step explanation:
Most one-party systems are often associated with non-democratic regimes where a single political party controls all levers of government, often suppressing political competition and dissent. Historical examples of single-party systems include Nazi Germany and the former East Germany, as well as current examples such as China and Cuba. These systems lack a pluralistic political landscape, resulting in little to no competition in elections, and typically feature censorship and restrictions on individual liberties.