Definitions Now, we really need some educating about this first, second, and third world nations issue. I'll do it as precisely and clearly as I can. First World http://dictionary.reference.com/search?q=first world Required conditions: A) During the Cold War. B) Industrialised. C) Capitalist (they refer to the USA side, as opposed to the USSR/"communist" side). In the oh-so-spooky tongue of logic, this is: (A.B.C) Second World http://dictionary.reference.com/search?q=second world Required conditions: A) During the Cold War. D) Communist (using the incorrect common-use meaning of "communist"). This gives us: (A.D) Third World http://dictionary.reference.com/search?q=third world Required conditions: A) During the Cold War. E) Developing nation. F) Geographically located in Asia, Africa, or Latin America. And this gives us: (A.E.F) So, if a country is to be considered 1st, 2nd, or 3rd world, it MUST be: (A.B.C)+(A.D)+(A.E.F) Iran Now, to find out which category Iran falls into, we check which factors apply to Iran. Simple, yes? First, let's check First World. A and B and C. A it meets, since it was during the Cold War; or it was A, but isn't any longer. B is debatable; it was industrialised, but not as heavily as some others. C is also debatable, given how much control the state had. So it might be first world, but it is not a very clean fit, so let's try some others. Let's try second world. For this, it must be A and D. It most certainly was A, but no longer. It was not D itself, but was ruled by, and allied with, the USA and USSR at different times. Looks like a second world country to me. But we don't like it, so let's move on and check another possibility. Is it a third world nation? Well, to be a third world nation, it must be A and E and F. It's most certainly not A, since the Cold War no longer exists. It is E, since it is developing. It is not F, since it is not part of Asia, Africa, or Latin America. So, it can not be third world. Notes For further education, Iran is situated on the Arabian plate.