I was under the impression "First World" meant NATO or other advanced nations like US, UK, Germany, France, Japan, Switzerland, etc. and "Second World" meant Soviet Bloc/Warsaw Pact like Poland, USSR, Hungary, and Third World was everything else.Mexico considered second world? surprised if it is. The idea of walking around in any mexican bigish city gives me the hibbie jibbies. I don't think a place as violent as Mexico can be considered 2nd world. Where I live is no walk in the park, but Mexico is downright scary (at least that's the vibe I get from it, never been)
The idea of walking around Guadalajara or Morelia or Tepic gives me a boner, because I won't be covered in sweat like Mazatlan, Manzanillo, PV, Lazaro...
Are you going to the Centro Historico and places you, as a tourist, belong?
You go to the wrong neighborhood here in Jacksonville, you'll be identified as an outsider on sight, and you'd stand a non-trivial chance of getting jumped and relieved of your possessions.