Polarity in international relations is like playing a game with different teams. Imagine you are playing with some of your friends and you have to decide who will be in which team. There can be different ways to set up the teams: either you can have two balanced teams, with the same number of players, or you can have one big team and one small team, or you can have one team that is much stronger than the other.
When we talk about international relations, we use the concept of "polarity" to describe the distribution of power among different countries. This means that we look at how much power each country has in the international system and how this power is distributed among them.
In international relations, we usually talk about three types of systems: unipolar, bipolar, and multipolar. Let's start with the easiest one: the unipolar system. This is like when one team has all the players and is therefore much stronger than the other team. In the international system, a unipolar system means that one country has much more power than all the other countries combined.
Now let's move on to the bipolar system. This is like when you have two evenly matched teams. In international relations, a bipolar system means that there are two countries or groups of countries that are equally powerful and are basically competing for influence and control over the rest of the countries.
Finally, we have the multipolar system. This is like when you have three or more teams that are more or less evenly matched. In international relations, a multipolar system means that there are several countries or groups of countries that are roughly equal in power and are competing with each other for influence and control.
The type of system that exists can have a big impact on how countries behave and relate to each other. In a unipolar system, the most powerful country tends to be very dominant and can sometimes act aggressively towards other countries. In a bipolar system, the two powerful countries tend to balance each other out and act as a kind of "checks and balances" system, trying to prevent each other from becoming too powerful. In a multipolar system, there are often many different alliances and conflicts between different countries or groups of countries, which can create a lot of instability and uncertainty.