Pieter de la Court was born in Leiden, the son of Pieter de la Court the Elder and Jeanne des Planques. His parents were protestant immigrants from Flanders, who settled in Leiden around 1613 in order to be able to practise their faith and to profit from the rapid expansion of Leiden as the world centre of cloth manufacturing. Pieter de la Court the Elder was a successful cloth merchant before he arrived in Leiden. His wife also came from a family of wealthy cloth manufacturers. They had established themselves as members of the local economic elite by the time Pieter was born. The couple had three other children; Jacob (born 1617), Johanna (born 1620) and Johan (1622–1660). Johan is generally seen as the author of at least two of the books that have later been ascribed to Pieter.
De la Court studied at Leiden University and completed his education with a Grand Tour through Europe in 1641 - 1643. He went to London, Saumur (France), Geneva and Basle. The diary he kept during his journey has been preserved and was published in 1928. After returning to Leiden, De la Court entered his father's profession and set up a cloth trading firm with his brother Johan. By 1650 the firm of the two brothers had evolved into one of the leading cloth operations in.
In spite of his immigrant background De la Court was able to penetrate the social elite of Holland. He became a close friend of Johan Eleman, who was a member of Leiden's governing council and a relative of John de Witt, the de facto leader of the Dutch Republic between 1653 and 1672. In 1657 De la Court married Eleman's sister in law, Elisabeth Tollenaer, who died only one year later in childbirth. In 1660 death struck again, this time taking De la Court's younger brother and business partner Johan. Pieter was remarried in 1661, this time to Catharina van der Voort, the sister of two wealthy Amsterdam merchants and, again, a relative of John de Witt.
It was in this turbulent period of De la Court's life that he published almost all of his books about the political economy of Holland and the larger Dutch Republic. In the preface to the Interest van Holland, the most renowned of these books, he explicitly ascribed this publishing frenzy to the need to distract his mind from the tragedy that had hit him. The centerpiece of this body of work was the Interest of Holland, published in 1662. It contained a critical analysis of the economic success of the Dutch Republic and demonstrated how this success had been brought about by the combined effects of free competition and free (i.e. republican) government. It became a bestseller overnight. In Holland the Interest van Holland gained notoriety and infamy as a republican manifesto. Abroad the Interest was widely translated and read as an explanatory guide to the miraculous economic success of the Dutch.
De la Court's second wife Catharina van der Voort gave him two children, Magdalena (1661) and Pieter (1664), later named Pieter de la Court van der Voort. In 1665 the family moved from Leiden to Amsterdam, by then the undisputed centre of world trade. There De la Court expanded the scope of his business activities by participating in the ventures of his two brothers in law.
De la Court became the leader of a consortium of Amsterdam merchants who sought to break the monopoly of the Dutch East India Company on all trade with the Dutch East Indies. The group filed petitions which claimed that the monopoly was limited to the trade route around the Cape of Good Hope. In 1668 they actually sent an exploratory vessel to the Arctic to find a shipping route around Siberia. The endeavour failed but shows De la Court was an advocate of free trade in theory and practice.
De la Court's publishing activity had made him a well known protagonist of the republican "party" in contemporary Dutch politics. This group, consisting primarily of the wealthy businessmen in the cities of Holland and led by John de Witt, effectively ran the Dutch Republic from 1650 until 1672. They strongly opposed the political powers and ambitions of the House of Orange-Nassau which usually held the office of Stadholder, a pseudo-royal position that somehow survived in the otherwise republican institutions of the Dutch Republic, except during this First Stadtholderless Period. De la Court was probably never close to John de Witt, but it has been established that De Witt was actively involved in the writing of De la Court's most outspoken and most widely read text, the Interest van Holland.
When the Orangist faction regained control of the country in 1672, John de Witt was lynched by an Orangist mob and Pieter de la Court fled to Antwerp where he stayed with his brother in law Guglielmo van der Voort. He returned to Amsterdam in 1673 where he lived as a merchant until his death in 1685. The last book that was published by De la Court appeared in 1669. A final work, the Sinryke Fabulen, was published posthumously in 1685.
De la Court's works were published anonymously, but contemporaries immediately identified Pieter de la Court as the author of most of them. It is now generally believed that some of these books were actually written by his brother, Johan, and that at least one other title was the work of his business friend Johan Uytenhage de Mist. It has been established as a fact that John de Witt and a number of other government officials contributed to the Interest van Holland. De la Court's oeuvre can be divided into three groups of titles.
The Interest van Holland was published in 1662 and immediately became a bestseller in Holland and later also elsewhere. The book contained an analysis of the miraculous economic success of Holland, the leading province of the Dutch Republic, and then set out to establish the economic and political principles on which that success was based. De la Court identified free competition and the republican form of government as the leading factors contributing to the wealth and power of his home country. The book was written in an outspoken and polemic style and went through eight editions in 1662. A revised luxury edition appeared in 1669. It was translated into German in 1665, English in 1702 and French in 1709. A new English translation appeared as late as 1746.
In 1660 De la Court published the Consideratien van Staet (Considerations of State), followed in 1662 by the Politike Discoursen. Both titles seek to establish a theoretical basis for the superiority of the republican form of government. Although the texts share the Interest's republican penchant, they have an altogether different nature. The tone is subdued and the style philosophical with extensive references to other political theorists. Both texts are now thought to have been written by De la Court's brother Johan.
The third and most extensive part of De la Court's work is the series of republican and anti-monarchist pamphlets he published in 1662 and 1663. The most well-known are the Historie der gravelike regering in Holland (History of the counts of Holland) and De stadthouderlijcke regeeringe in Hollandt ende West-Vrieslandt (History of the stadholders of Holland and West-Friesland). Both books contain vivid albeit rather one-sided descriptions of the damage that had been done to the country by monarchical leaders since the Middle Ages.
The Interest van Holland is one of the preeminent textbooks of economic and political freedom in the seventeenth and eighteenth centuries. The book was an immediate bestseller in the Dutch Republic and went through eleven editions between 1662 and 1671. The Dutch version was read in political circles throughout Europe and translations appeared in German (1665 and 1671), French (1709) and English (1702, 1743 and 1746). The book had a significant influence on political and economic thinking but its primary importance lay in the impact it had on office holders and political reality. The Interest van Holland was not a philosophical disquisition, but a recipe book for political and economic success.
Within the Dutch Republic the Interest van Holland became the de facto government manifesto of the republican oligarchy led by John de Witt until 1672. The Interest van Holland viciously attacked the pseudo-royal stadtholders. De Witt abolished the office in 1669. The Interest was wary of war and geographical expansion. The States of Holland neglected the army and sought to evade conflicts with their bigger neighbours. Instead the money was spent on a naval buildup, another Interest recommendation. At sea the military would not primarily be a cost, but a useful tool in protecting and promoting the commercial interests of the Republic and its rulers. Finally the Interest was vehemently opposed to monopoly, most notably the Dutch East and West India Companies and the guilds, the closed associations of craftsmen that controlled most manufacturing activity. The two trading companies, huge sovereign entities way beyond the control of the provincial and city governments of Holland, were immune to these attacks and survived all the way to the end of the Dutch Republic. But De la Court did play a role in the demise of the guilds that were increasingly seen as obstacles to economic innovation and growth. The regime of De Witt ended in 1672. The Interest van Holland remained a leading source of republican inspiration until the dissolution of the Republiek der Zeven Verenigde Nederlanden in 1795.
The Interest van Holland was widely read in Europe for a number of reasons. When the book appeared it stirred the curiosity of political rulers throughout the continent because it was seen as a look into the backrooms of the Dutch political and economic machinery. Later the text was espoused by supporters of free trade and republicanism throughout Europe, for whom it remained a source of inspiration until the end of the eighteenth century. It is hard to overestimate the profound influence of the Interest van Holland on the European and American political elites of the seventeenth and eighteenth centuries as can be seen from numerous examples. The book was read and used by politicians as diverse as Jean-Baptiste Colbert, James Madison and Turgot. It was quoted and discussed by free trade pamphleteers in Britain and Physiocrats in France. It can be assumed that the book was also one of the sources of inspiration also for Adam Smith's Wealth of Nations.
The text of the last English edition of the Interest can be downloaded from the website of the Liberty Fund: Pieter de la Court, The True Interest and Political Maxims, of the Republic of Holland (1662). The leading source on De la Court's life and works is Ivo W. Wildenberg, Johan & Pieter de la Court (Amsterdam & Maarssen, 1986).