A difficult but good question...
I'd say there are two ways for nations to disappear.
1. They are politically incorporated into another state, or run as an outright conquered vassal of another state.
2. A state is overrun with so many people from one or more other nations that its entire character changes, and while it may exist as a political
entity, it no longer bears any characteristics of the state as it was founded.
SA will be overrun and ruled by foreigners from the rest of Africa in 2022. It will bear little resemblance to the "liberated SA" in 1994.
Our languages like isiZulu, isiXhosa or Afrikaans will verge on extinction, possibly replaced by Arabic, French and English, or some kind of
The white population (who owned the majority, but drier parts of the land) will be largely dispossessed, or living in exile. The same with the
Indians, and many of the coloreds.
Without the "white devils" and their expertise, the country will fall further into ruin, although the begging hands of the Marxist Africanists will be
hard pressed to find much sympathy, as the Western world, tired of accusations of exploitation and dishing out money to corrupt scoundrels, will close
ranks and increasingly cut foreign aid and trade.
The Chinese will rule, and openly direct politics.
Our borders with Zimbabwe are already porous, and the ANC love Mugabe, so maybe we should just become one big Arsezania?
edit on 14-2-2012 by halfoldman because: (no reason given)