But Colonial experience can give us more than that. It can provide us not only with an immense mass of arguments and instances against disruption, but with invaluable instances of what can be done to strengthen and build up the Union against all possible future danger of disruptive tendencies. The confederation of Canada was accomplished in the teeth of all the geographical and economic conditions of the time. Canadian statesmanship thereupon set itself to transform geography, and to divert the course of trade in order to make the Union a reality. The Intercolonial Railway, the Canadian Pacific, the Grand Trunk Pacific, the proposed Hudson Bay Railway, and the Georgian Bay Canal schemes, all these have been deliberate instruments of policy, aiming, first of all, at bridging the wilderness between practically isolated settlements scattered across a continent, and creating a continuous Canada, east and west; and, secondly, at giving that continuous strip depth as well as extension. Hand in hand with the policy of constructing the internal framework of transportation, which is the skeleton of the economic and social life of a nation, went the policy of maintaining a national tariff to clothe that skeleton with the flesh and blood of production and exchange, and, as far as possible, to clothe it evenly. Australia, too, is waking, though somewhat hesitatingly, to the need of transcontinental railways, for the protection of new industries and for the even development and filling up of all her territories. In South Africa the economic process preceded the political. It was the dread of the breakdown of a temporary customs union already in existence that precipitated the discussion of union. And it was the development of the Rand as the great internal market of South Africa, and the competitive construction of railway lines from the coast, that really decided the question of legislative union against federation. All three instances lead to the same conclusion that union to be really effective and stable needs three things: firstly, a developed system of internal communications reducing all natural barriers to social, political, and commercial intercourse to the very minimum; secondly, a national tariff, protective or otherwise, sufficient at least to encourage the fullest flow of trade along those communications rather than outside of them; thirdly, a deliberate use of the tariff and of the national expenditure to secure, as far as possible, the even development of every portion of the national territory.