I was reading Malcolm X's autobiography and what surprised in the book was the fact that he was able to visit Saudi Arabia and numerous African states without obtaining a visa in advance. Nowadays this would be largely impossible as Saudi Arabia requires most visitors to apply for a visa in advance, especially for a visit to Mecca. When did the visa system for regulating entry and exit become widespread as we know it today? E.g. until what year could an Indian/Afgani/Iranian citizen freely en...
