Along with Rousseau's Emile (1762), Locke's Some Thoughts Concerning Education was one of the foundational eighteenth-century texts on educational theory. In Britain, it was considered the standard treatment of the topic for over a century. For this reason, some critics have maintained that Some Thoughts Concerning Education vies with the Essay Concerning Human Understanding for the title of Locke's most influential work. Some of Locke's contemporaries, such as seventeenth-century German philosopher and mathematician Gottfried Leibniz, believed this as well; Leibniz argued that Some Thoughts superseded even the Essay in its impact on European society.[58]
Locke's Some Thoughts Concerning Education was a runaway best-seller. During the eighteenth century alone, Some Thoughts was published in at least 53 editions: 25 English, 16 French, six Italian, three German, two Dutch, and one Swedish.[59] It was also excerpted in novels such as Samuel Richardson's Pamela (1740–1), and it formed the theoretical basis of much children's literature, particularly that of the first successful children's publisher, John Newbery. According to James A. Secord, an eighteenth-century scholar, Newbery included Locke's educational advice to legitimise the new genre of children's literature. Locke's imprimatur would ensure the genre's success.[60]
By the end of the eighteenth century, Locke's influence on educational thought was widely acknowledged. In 1772 James Whitchurch wrote in his Essay Upon Education that Locke was "an Author, to whom the Learned must ever acknowledge themselves highly indebted, and whose Name can never be mentioned without a secret Veneration, and Respect; his Assertions being the result of intense Thought, strict Enquiry, a clear and penetrating Judgment."[61] Writers as politically dissimilar as Sarah Trimmer, in her periodical The Guardian of Education (1802–06),[62] and Maria Edgeworth, in the educational treatise she penned with her father, Practical Education (1798), invoked Locke's ideas. Even Rousseau, while disputing Locke's central claim that parents should treat their children as rational beings, acknowledged his debt to Locke.[63]
John Cleverley and D. C. Phillips place Locke's Some Thoughts Concerning Education at the beginning of a tradition of educational theory which they label "environmentalism". In the years following the publication of Locke's work, Etienne Bonnot de Condillac and Claude Adrien Helvétius eagerly adopted the idea that people's minds were shaped through their experiences and thus through their education. Systems of teaching children through their senses proliferated throughout Europe. In Switzerland, Johann Heinrich Pestalozzi, relying on Locke's theories, developed the concept of the "object lesson." These lessons focused pupils' attention on a particular thing and encouraged them to use all of their senses to explore it and urged them to use precise words to describe it. Used throughout Europe and America during the eighteenth and nineteenth centuries, these object lessons, according to one of their practitioners "if well-managed, cultivate Sense-Perception, or Observation, accustom children to express their thoughts in words, increase their available stock of words and of ideas, and by thus storing material for thinking, also prepare the way for more difficult and advanced study."[64]
Such techniques were also integral to Maria Montessori's methods in the twentieth century. According to Cleverley and Phillips, the television show Sesame Street is also "based on Lockean assumptions—its aim has been to give underprivileged children, especially in the inner cities, the simple ideas and basic experiences that their environment normally does not provide."[65] In many ways, despite Locke's continuing influence, as these authors point out, the twentieth century has been dominated by the "nature vs. nurture" debate in a way that Locke's century was not. Locke's optimistic "environmentalism," though qualified in his text, is now no longer just a moral issue – it is also a scientific issue.[66]
