@Emily: generation --- I dare to disagree. There is no in-built connotation of progress attached the word "generation". Of course, generations do co-exist, like socially, as you said. The generation Z cannot pretend it is superior the Millennials, for example, or to my generation. They are just different.

In peace-keeping there were still first generations peace-keeping operations (UNFYCIP) that co-existed with second, third and fourth generation (UNTAC, UNOSOM, UNPROFOR).

Source author: Petru Dumitriu PetruD@diplomacy.edu