“Differences between nations, so long as they do not lead to hostility, are by no means to be deplored. Living for a time in a foreign country makes us aware of merits in which our own country is deficient, and this is true whichever country our own may be. The same thing holds of differences between different regions within one country, and of the differing types produced by different professions. Uniformity of character and uniformity of culture are to be regretted. Biological evolution has depended upon inborn differences between individuals or tribes, and cultural evolution depends upon acquired differences. When these disappear, there is no longer any material for selection. In the modern world, there is a real danger of too great similarity between one region and another in cultural respects. One of the best ways of minimising this evil is an increase in the autonomy of different groups.”