Hugo Grotius (10 April 1583 – 28 August 1645), also known as Huig de Groot, Hugo Grocio or Hugo de Groot, was a jurist in the Dutch Republic. With Francisco de Vitoria and Alberico Gentili he laid the foundations for international law, based on natural law. He was also a philosopher, theologian, Christian apologist, playwright, and poet.

Grotius's influence on international law is paramount, and is acknowledged by, for instance, the American Society of International Law, which since 1999 holds an annual series of Grotius Lectures. Additionally, his contributions to Arminian theology provided the seeds for later Arminian-based movements, such as Methodism and Pentecostalism and he is acknowledged as a significant figure in the Arminianism-Calvinism debate.

Born in Delft during the Dutch Revolt, Hugo was the first child of Jan de Groot and Alida van Overschie. His father was a man of learning, once having studied with the eminent Justus Lipsius at Leiden, as well as of political distinction, and he groomed his son from an early age in a traditional humanist and Aristotelian education. A prodigious learner, Hugo entered the University of Leiden when he was just eleven years old. There he studied with some of the most acclaimed intellectuals in northern Europe, including Franciscus Junius, Joseph Justus Scaliger, and Rudolph Snellius. At age sixteen he published his first book: a scholarly edition of the late antique author Martianus Capella's work on the seven liberal arts, Martiani Minei Felicis Capellæ Carthaginiensis viri proconsularis Satyricon, in quo De nuptiis Philologiæ & Mercurij libri duo, & De septem artibus liberalibus libri singulares. Omnes, & emendati, & Notis, siue Februis Hug. Grotii illustrati.

Benjamin Disraeli, 1st Earl of Beaconsfield, KG, PC, FRS, (21 December 1804 – 19 April 1881) was a British Prime Minister, parliamentarian, Conservative statesman and literary figure. He served in government for three decades, twice as Prime Minister of the United Kingdom. Although his father had him baptised to Anglicanism at age 12, he was nonetheless Britain's first and thus far only Prime Minister who was born into a Jewish family—originally from Portugal. He played an instrumental role in the creation of the modern Conservative Party after the Corn Laws schism of 1846.

Although he was a major figure in the protectionist wing of the Conservative Party after 1844, Disraeli's relations with the other leading figures in the party, particularly Lord Derby, the overall leader, were often strained. Not until the 1860s would Derby and Disraeli be on easy terms, and the latter's succession of the former assured. From 1852 onwards, Disraeli's career would also be marked by his often intense rivalry with William Ewart Gladstone, who eventually rose to become leader of the Liberal Party. In this feud, Disraeli was aided by his warm friendship with Queen Victoria, who came to detest Gladstone during the latter's first premiership in the 1870s. In 1876 Disraeli was raised to the peerage as the Earl of Beaconsfield, capping nearly four decades in the House of Commons.

John Locke FRS ( /ˈlɒk/; 29 August 1632 – 28 October 1704), widely known as the Father of Classical Liberalism, was an English philosopher and physician regarded as one of the most influential of Enlightenment thinkers. Considered one of the first of the British empiricists, following the tradition of Francis Bacon, he is equally important to social contract theory. His work had a great impact upon the development of epistemology and political philosophy. His writings influenced Voltaire and Rousseau, many Scottish Enlightenment thinkers, as well as the American revolutionaries. His contributions to classical republicanism and liberal theory are reflected in the United States Declaration of Independence.

Locke's theory of mind is often cited as the origin of modern conceptions of identity and the self, figuring prominently in the work of later philosophers such as Hume, Rousseau and Kant. Locke was the first to define the self through a continuity of consciousness. He postulated that the mind was a blank slate or tabula rasa. Contrary to pre-existing Cartesian philosophy, he maintained that we are born without innate ideas, and that knowledge is instead determined only by experience derived from sense perception.