How many world rulers are there?

The number of world rulers can vary depending on how one defines "ruler." As of now, there are approximately 195 countries, each typically led by a head of state or government, such as a president or prime minister. Additionally, some territories, regions, and non-sovereign entities have their own leaders. Therefore, the total number of world rulers is generally in the range of 200 to 300, considering various forms of governance and leadership.