Keynesian Economics

Need a little help here.

Could someone explain to me what this is all about?
- Advantages
- Disadvantages
- Which countries use them and why?

I've read some stuff about it online but I don't understand some of the terms that are being used. Thanks.

>>12
What's wrong with libertarians, libertarian principles and true libertarian values? There are too many communists, why aren't you worried about the rise of Stalinism? Obviously we could use some more libertarianism in here right about now.