In 1900, the world was experiencing a mix of political systems, with many countries still under colonial rule or authoritarian regimes. However, there were some democratic countries that emerged during this time. Here is a list of countries that were democratic in 1900:

1. United States: The United States had a well-established democratic system by 1900, with regular elections and a strong commitment to individual freedoms and rights.

2. United Kingdom: The United Kingdom had a constitutional monarchy with a parliamentary democracy, where the power was gradually shifting from the monarchy to the elected representatives.

3. France: France had a democratic system with a bicameral parliament and universal suffrage for men. However, political instability and frequent changes in government were common during this period.

4. Switzerland: Switzerland had a unique system of direct democracy, where citizens participated in decision-making through referendums and initiatives.

5. Australia: Australia had a parliamentary democracy by 1900, with a federal system of government and regular elections.

In 1950, the world saw significant changes in the political landscape, with the aftermath of World War II leading to the spread of democracy in many regions. Here is a list of countries that were democratic in 1950:

1. United States: The United States continued to be a democratic country with a strong democratic tradition and a two-party system.

2. United Kingdom: The United Kingdom maintained its democratic system, with a constitutional monarchy and parliamentary democracy.

3. France: France also remained a democratic country, although it went through political upheavals during this period.

4. India: India, which gained independence from British rule in 1947, established a democratic system with universal suffrage and regular elections.

5. Canada: Canada had a parliamentary democracy with a constitutional monarchy, similar to the United Kingdom.

By 1975, the number of democratic countries had increased significantly. The decolonization movements in Africa and Asia, as well as the fall of authoritarian regimes in some parts of the world, contributed to this expansion of democracy. Here is a list of countries that were democratic in 1975:

1. United States: The United States continued its democratic tradition, with a stable political system and regular elections.

2. United Kingdom: The United Kingdom maintained its democratic system, with periodic elections and a constitutional monarchy.

3. France: France remained a democratic country, although it faced challenges from social and political movements during this period.

4. Japan: Japan established a democratic system after World War II, with a constitutional monarchy and a parliamentary democracy.

5. Germany: West Germany, after World War II, became a democratic country with a federal system and regular elections.

By 2000, the world experienced a further expansion of democracy, as more countries transitioned from authoritarian rule to democratic systems. Here is a list of countries that were democratic in 2000:

1. United States: The United States continued to be a democratic country, with a strong democratic tradition and a two-party system.

2. United Kingdom: The United Kingdom maintained its democratic system, with a constitutional monarchy and parliamentary democracy.

3. France: France remained a democratic country, with a stable political system and regular elections.

4. India: India, with its diverse population and parliamentary system, continued to be a democratic country.

5. South Africa: South Africa transitioned from apartheid to a democratic system, with universal suffrage and regular elections.

It is important to note that the above lists