The period of practical British monopoly, 1815-1878, had thus brought about a very remarkable transformation in the character of the British Empire. It had greatly increased in extent, and by every test of area, population, and natural resources, it was beyond comparison the greatest power that had ever existed in the world. But its organisation was of an extreme laxity; it possessed no real common government; and its principal members were united rather by a community of institutions and ideas than by any formal ties. Moreover, it presented a more amazing diversity of racial types, of religions, and of grades of civilisation, than any other political fabric which had existed in history. Its development had assuredly brought about a very great expansion of the ideas of Western civilisation over the face of the globe, and, above all, a remarkable diffusion of the institutions of political liberty. But it remained to be proved whether this loosely compacted bundle of states possessed any real unity, or would be capable of standing any severe strain. The majority of observers, both in Britain itself and throughout the world, would have been inclined, in 1878, to give a negative answer to these questions.
VII
THE ERA OF THE WORLD-STATES, 1878-1900
The Congress of Berlin in 1878 marks the close of the era of nationalist revolutions and wars in Europe. By the same date all the European states had attained to a certain stability in their constitutional systems. With equal definiteness this year may be said to mark the opening of a new era in the history of European imperialism; an era of eager competition for the control of the still unoccupied regions of the world, in which the concerns of remote lands suddenly became matters of supreme moment to the great European powers, and the peace of the world was endangered by questions arising in China or Siam, in Morocco or the Soudan, or the islands of the Pacific. The control of Europe over the non-European world was in a single generation completed and confirmed. And the most important of the many questions raised by this development was the question whether the spirit in which this world-supremacy of Europe was to be wielded should be the spirit which long experience had inspired in the oldest of the colonising nations, the spirit of trusteeship on behalf of civilisation; or whether it was to be the old, brutal, and sterile spirit of mere domination for its own sake.