The most sweeping denials of performance superiority [between cultures] have been based on redefining them out of existence as culturally biased “perceptions” and “stereotypes.” Those who take this approach of cultural relativism acknowledge only differences but no superiority. Yet all cultures serve practical purposes, as well as being symbolic and emotional, and they serve these practical purposes more efficiently or less efficiently — not just in the opinions of particular observers but, more importantly, in the practices of the societies themselves, which borrow from other cultures and discard their own ways of doing particular things.
Western civilization, for example, has abandoned Roman numerals for mathematical work, in favor of a very different numbering system originating in India and conveyed to the West by Arabs. The West has also abandoned scrolls in favor of paper, and scribes in favor of printing, in each case choosing things originating in China over things indigenous to Western culture. All over the world, people have abandoned their own bows and arrows for guns, whenever they had a choice. Much of the story of the advancement of the human race has been a story of massive cultural borrowings, which have created modern world technology.Thomas Sowell, The Quest for Cosmic Justice, pp. 60 – 61