There are 4 institutions in the EU.
THe Parliament. We vote for representatives using a proportional representation. This means that you get a right wing block, and a left wing block. I think there are 751, of which about 90 are British, becasue Britain has one of the highest populations. Smaller countries have an advantage as they are allocated more MEPs per head than populous countries.
The Commission. One politically appointed representative from each country. They all have a different area to work on, so business, environment, health etc.
Then there's one that I dont know what it's called in ENglish, but it's a get together of all the national parliament ministers, so the environment ministers might get together to hash out some new environmental legislation in partnership with the EU parliament. Each country gets to be chair for 6 months at a time.
Then there's the Court. It gets a bad name in the British press, but generally I think it's a good thing if EU countries are breaking international laws, particularly on human rights that they cvan be held to account.
Pros of the EU:
- economic cooperation ehlped the development of each others economies after the war. Made it cheaper to do business in Europe.
- ease of movement
-some crises are too big for national governments to figure out by themselves and require international cooperation. Environment and refugees are a good example of this.
-proportional representation means that all opinions are represented.
-it underpins a lot of legislation in the UK, like equal rights for part time workers. Things like minimum wage, paid holidays, sick leave.
Cons
-proportional representation means that all opinions are represented.
-it's very slow, and very beaurocratic.
-the democracy aspect is questionable
-an import wall means it's harder for developing countries to sell their wares here and thus develop economically as we did.
That's all I can think of off the top of my head.