system
Given the following post, respond as if you're commenting on Reddit:
human
Which IR theories are the most popular today? Which contemporary IR theorists are the most cited?

I live and study in Poland and I can't help but think that the curriculums in our universities are a bit outdated when it comes to international relations theory. Even the university libraries don't really have anything newer than 2000 or if they do, it is just a reiteration of the works from the 20th century. It is difficult to learn which are the most dominants theories/paradigms/schools in the second decade of the 21st century and which currently living scholars contribute the most to the discipline.

Can anybody fill this gap for me? Where should one look when trying to analyse the current status of IR?
gpt
Your main three are probably Realism, Institutionalism (Liberalism), and Critical theory. None of these are particularly new, but critical theory is the most recent. All of these were mainly developed by 2000 so you should be able to find some information on them. 

Foreign policy ideas of course are always changing in the contemporary. You could check out the most recent pop-theory “Why Nations Fail”. It was a great read.