It is also in theory, conceivable that some universal empire some day might cover the whole globe, leaving no external "barbarians" to serve as invaders.


Chapter 5, Historical Change in Civilizations, p. 163 - The Evolution of Civilizations (1961) (Second Edition 1979)


It is also in theory, conceivable that some universal empire some day might cover the whole globe, leaving no external barbarians to serve as...

It is also in theory, conceivable that some universal empire some day might cover the whole globe, leaving no external barbarians to serve as...

It is also in theory, conceivable that some universal empire some day might cover the whole globe, leaving no external barbarians to serve as...

It is also in theory, conceivable that some universal empire some day might cover the whole globe, leaving no external barbarians to serve as...