Have you? Ok, the Romans, Vikings. What you are talking bout was in the 17th century and before. The world moved on, industries were built, schools created education, where everything else branched off into a civilized world.
3rd world countries can't even farm properly.
If you are comparing the modern invasion of 3rd world countries, that are being allowed in, given money, free accomadation, all paid for by peoples hard earned money, that they did not contribute too, with governments that allow it to happen; against actual conquests over 500 years ago, then you need to read more books.
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