Цивілізація: відмінності між версіями

| оригінал = When the barbarian, advancing step by step, had discovered the native metals and learned to melt them in the crucible and to cast them in moulds; when he had alloyed native copper with tin and produced bronze; and, finally, when by a still greater effort of thought he had invented the furnace, and produced iron from the ore, nine-tenths of the battle for civilization was gained.

| Автор = [[Льюїс Генрі Морган]] (книга «[https://www.marxists.org/reference/archive/morgan-lewis/ancient-society/ch03.htm Ancient Society]»)}}

 

== Джерела ==