Edward Grey, 1st Viscount Grey of Fallodon,, better known as Sir Edward Grey, was a British statesman and Liberal Party politician who was the main force behind British foreign policy in the era of the First World War.

The Liberal Party was one of the two major political parties in the United Kingdom, along with the Conservative Party, in the 19th and early 20th centuries. Beginning as an alliance of Whigs, free trade-supporting Peelites, and reformist Radicals in the 1850s, by the end of the 19th century, it had formed four governments under William Gladstone. Despite being divided over the issue of Irish Home Rule, the party returned to government in 1905 and won a landslide victory in the 1906 general election.