Culturally there was a transition away from the rationalism of the Georgian period and toward romanticism and mysticism with regard to religion, social values, and the arts. In international relations the era was a long period of peace, known as the Pax Britannica, and economic, colonial, and industrial consolidation, temporarily disrupted by the Crimean War in 1854. The end of the period saw the Boer War. Domestically, the agenda was increasingly liberal with a number of shifts in the direction of gradual political reform, industrial reform and the widening of the voting franchise.
Two especially important figures in this period of British history are the prime ministers Gladstone and Disraeli, whose contrasting views changed the course of history. Disraeli, favoured by the queen, was a gregarious Tory. His rival Gladstone, a Liberal distrusted by the Queen, served more terms and oversaw much of the overall law-making of the era.
The population of England almost doubled from 16.8 million in 1851 to 30.5 million in 1901. Scotland's population also rose rapidly, from 2.8 million in 1851 to 4.4 million in 1901. Ireland's population decreased rapidly, from 8.2 million in 1841 to less than 4.5 million in 1901, mostly due to the Great Famine. At the same time, around 15 million emigrants left the United Kingdom in the Victorian era and settled mostly in the