The interventions of Britain in continental politics were generally on behalf of the principles of nationality and self-government. Under the influence of Castlereagh and Canning the British government gradually broke away from the Holy Alliance formed to suppress all protests against the settlement reached after Napoleon's fall; and Britain interposed with decisive effect at the battle of Navarino in 1827, which secured the independence of Greece from Turkey. More diplomatic intervention assisted the South American colonies to assert their independence of the Spanish mother-country; and British volunteers helped the Liberal cause in Spain and Portugal against reactionary monarchs. Belgium was countenanced in its successful revolution against the House of Orange, and Italian states in their revolts against native and foreign despots; the expulsion of the Hapsburgs and Bourbons from Italy, and its unification on a nationalist basis, owed something to British diplomacy, which supported Cavour, and to British volunteers who fought for Garibaldi. The attitude of Britain towards the Balkan nationalities, which were endeavouring to throw off the Turkish yoke, was more dubious; while Gladstone denounced Turkish atrocities, Disraeli strengthened Turkey's hands. Yet England would have been as enthusiastic for a liberated and united Balkan power as it had been for a united Italy but for the claims of a rival liberator, Russia.

Russia was the bugbear of two generations of Englishmen; and classical scholars, who interpreted modern politics by the light of ancient Greece, saw in the absorption of Athens by Macedon a convincing demonstration of the fate which the modern barbarian of the north was to inflict upon the British heirs of Hellas. India was the real source of this nervousness. British dominion, after further wars with the Mahrattas, the Sikhs, and the Gurkhas, had extended up to the frontiers of Afghanistan; but there was always the fear lest another sword should take away dominion won by the British, and in British eyes it was an offence that any other power should expand in Asia. The Russian and British spheres of influence advanced till they met in Kabul; and for fifty years the two powers contested, by more or less diplomatic methods, the control of the Amir of Afghanistan. Turkey flanked the overland route to India; and hence the protection of Turkey against Russia became a cardinal point in British foreign policy. On behalf of Turkey's integrity Great Britain fought, in alliance with France and Sardinia, the futile Crimean War of 1854-1856, and nearly went to war in 1877.

The opening of the Suez Canal in 1869 introduced a fresh complication. Relations between England and France had since Waterloo been friendly, on the whole; but France had traditional interests in Egypt, which were strengthened by the fact that a French engineer had constructed the Suez Canal, and by French colonies in the Far East, to which the canal was the shortest route. Rivalry with England for the control of Egypt followed. The Dual Control, which was established in 1876, was terminated by the refusal of France to assist in the suppression of Egyptian revolts in 1882; and Great Britain was left in sole but informal possession of power in Egypt, with the responsibility for its defence against the Mahdi (1884-1885) and for the re-conquest of the Sudan (1896-1898), which is now under the joint Egyptian and British flags.

Meanwhile, British expansion to the east of India, the Burmese wars, and annexation of Burma (1885) brought the empire into a contact with French influence in Siam similar to its contact with Russian in Afghanistan. Community of interests in the Far East, as well as the need of protection against the Triple Alliance of Germany, Austria, and Italy produced the entente cordiale between France and Russia in 1890. Fortunately, the dangerous questions between them and Great Britain were settled by diplomacy, assisted by the alliance between Great Britain and Japan. The British and Russian spheres of action on the north-west, and the British and French spheres to the east, of India were delimited; southern Persia, the Persian Gulf, and the Malay Peninsula were left to British vigilance and penetration, northern Persia to Russian, and eastern Siam to French. Freed from these causes of friction, Great Britain, Russia, and France exert a restraining influence on the predominant partner in the Triple Alliance.

The development of a vast dominion in India has created for the British government problems, of which the great Indian mutiny of 1857 was merely one illustration. No power has succeeded in permanently governing subject races by despotic authority; in North and South America the natives have so dwindled in numbers as to leave the conquerors indisputably supreme; in Europe and elsewhere in former times the subject races fitted themselves for self-government, and then absorbed their conquerors. The racial and religious gulf forbids a similar solution of the Indian question, while the abandonment of her task by Great Britain would leave India a prey to anarchy. The difficulties of despotic rule were mitigated in the past by the utter absence of any common sentiments and ideas among the many races, religions, and castes which constituted India; and a Machiavellian perpetuation of these divisions might have eased the labours of its governors. But a government suffers for its virtues, and the steady efforts of Great Britain to civilize and educate its Eastern subjects have tended to destroy the divisions which made common action, common aspirations, public opinion and self-government impossible in India. The missionary, the engineer, the doctor, the lawyer, and the political reformer have all helped to remove the bars of caste and race by converting Brahmans, Mohammedans, Parsees to a common Christianity or by undermining their attachment to their particular distinctions. They have built railways and canals, which made communications and contact unavoidable; they have imposed common measures of health, common legal principles, and a common education in English culture and methods of administration. The result has been to foster a consciousness of nationality, the growth of a public opinion, and a demand for a greater share in the management of affairs. The more efficient a despotism, the more certain is its supersession; and the problem for the Indian government is how to adjust and adapt the political emancipation of the natives of India to the slow growth of their education and sense of moral responsibility. At present, caste and racial and religious differences, especially between Mohammedans and Hindus, though weakening, are powerful disintegrants; not one per cent of the population can read or write; and the existence of hundreds of native states impedes the progress of national agitation.

A somewhat similar problem confronts British administration in Egypt, where the difficulty of dealing with the agitation for national self- government is complicated by the fact that technically the British agent and consul-general is merely the informal adviser of the khedive, who is himself the viceroy of the Sultan of Turkey. Ultimately the same sort of dilemma will have to be faced in other parts of Africa under British rule—British East Africa and Uganda, the Nigerian protectorates and neighbouring districts, Rhodesia and British Central Africa—as well as in the Malay States, Hong Kong, and the West Indies. There are great differences of opinion among the white citizens of the empire with regard to the treatment of their coloured fellow-subjects. Australia and some provinces of the South African Union would exclude Indian immigrants altogether; and white minorities have an invincible repugnance to allowing black majorities to exercise a vote, except under stringent precautions against its effect. We have, indeed, improved upon the Greeks, who regarded all other races as outside the scope of Greek morality; but we do not yet extend to coloured races the same consideration that we do to white men.

So far as the white population of the empire is concerned, the problem of self-government was solved in the nineteenth century by procedure common to all the great dominions of the crown, though the emancipation, which had cost the mother-country centuries of conflict, was secured by many colonies in less than fifty years. Three normal stages marked their progress, and Canada led the way in each. The first was the acquisition of representative government—that is to say, of a legislature consisting generally of two Houses, one of which was popularly elected but had little control over the executive; the second was the acquisition of responsible government—that is to say, of an executive responsible to the popular local legislature instead of to the home Colonial Office; and the third was federation. Canada had possessed the first degree of self-government ever since 1791 (see p. 169), and was rapidly outgrowing it. Australia, however, did not pass out of the crown colony stage, in which affairs are controlled by a governor, with or without the assistance of a nominated legislative council, until 1842, when elected members were added to the council of New South Wales, and it was given the power of the purse. This development was due to the exodus of the surplus population, created by the Industrial Revolution, from Great Britain, which began soon after 1820, and affected Canada, Australia, New Zealand, and South Africa. Various companies and associations were founded under the influence of Lord Durham, Edward Gibbon Wakefield, and others, for the purpose of settling labourers in these lands. Between 1820 and 1830 several settlements were established in Western Australia, in 1836 South Australia was colonized, and gradually Victoria, Queensland, and Tasmania were organized as independent colonies out of offshoots from the parent New South Wales. Each in turn received a representative assembly, and developed individual characteristics.

Cape Colony followed on similar lines, variegated by the presence of a rival European race, the Dutch. Slowly, in the generation which succeeded the British conquest, they accumulated grievances against their rulers. English was made the sole official language; Dutch magistrates were superseded by English commissioners; slavery was abolished, with inadequate compensation to the owners; little support was given them in their wars with the natives, which the home government and the missionaries, more interested in the woes of negroes in South Africa than in those of children in British mines and factories, attributed to Dutch brutality; and a Hottentot police was actually established. In 1837 the more determined of the Dutch "trekked" north and east to found republics in Natal, the Orange River Free State, and the Transvaal. Purged of these discontented elements, the Cape was given representative government in 1853, and Natal, which had been annexed in 1844, received a similar constitution in 1856.

Meanwhile, Canada had advanced through constitutional struggles and open rebellion to the second stage. It had received its baptism of fire during the war (1812-1814) between Great Britain and the United States, when French and British Canadians fought side by side against a common enemy. But both provinces soon experienced difficulties similar to those between the Stuarts and their parliaments; their legislative assemblies had no control over their executive governments, and in 1837 Papineau's rebellion broke out in Lower, and Mackenzie's in Upper, Canada. Lord Durham was sent out to investigate the causes of discontent, and his report marks an epoch in colonial history. The idea that the American War of Independence had taught the mother-country the necessity of granting complete self-government to her colonies is a persistent misconception; and hitherto no British colony had received a fuller measure of self-government than had been enjoyed by the American colonies before their Declaration of Independence. The grant of this responsible self-government was one of the two principal recommendations of Lord Durham's report. The other was the union of the two provinces, which, it was hoped, would give the British a majority over the French. This recommendation, which ultimately proved unworkable, was carried out at once; the other, which has been the saving of the empire, was left for Lord Elgin to elaborate. He made it a principle to choose as ministers only those politicians who possessed the confidence of the popular assembly, and his example, followed by his successors, crystallized into a fundamental maxim of British colonial government. It was extended to Nova Scotia and New Brunswick in 1848, and to Newfoundland (which had in 1832 received a legislative assembly) in 1855.

To Lord John Russell, who was prime minister from 1846 to 1851, to his colonial secretary, the third Earl Grey, and to Lords Aberdeen and Palmerston, who succeeded as premiers in 1852 and 1855, belongs the credit of having conferred full rights of self-government on most of the empire's oversea dominions. Australia, where the discovery of gold in 1851 added enormously to her population, soon followed in Canada's wake, and by 1856 every Australian colony, with the exception of Western Australia, had, with the consent of the Imperial parliament, worked out a constitution for itself, comprising two legislative chambers and a responsible cabinet. New Zealand, which had begun to be sparsely settled between 1820 and 1840, and had been annexed in the latter year, received in 1852 from the Imperial parliament a Constitution Act, which left it to Sir George Grey, the Governor, to work out in practice the responsibility of ministers to the legislature. Other colonies were slower in their constitutional development; Cape Colony was not granted a responsible administration till 1872; Western Australia, which had continued to receive convicts after their transportation to other Australian colonies had been successfully resisted, did not receive complete self-government till 1890, and Natal not until 1893.