General laws should always be distinguished from individual causes that may modify their effects. If all the South were covered with Republics and all the North with despotic States, it would be none the less true that, in point of climate, despotism is suitable to hot countries, barbarism to cold countries, and good polity to temperate regions. I see also that, the principle being granted, there may be disputes on its application; it may be said that there are cold countries that are very fertile, and tropical countries that are very unproductive. But this difficulty exists only for those who do not consider the question in all its aspects. We must, as I have already said, take labour, strength, consumption, etc. , into account.