Gottfried Wilhelm Leibniz Timeline

Leibniz became secretary and counselor to Johann Christian von Boineburg in Frankfurt, beginning decades of service as a diplomat, librarian, and advisor to German courts and princes.

Leibniz drafted proposals urging Louis XIV of France to redirect his military ambitions toward Egypt instead of Europe, hoping to divert French aggression away from Germany while advancing trade and civilization.

Leibniz entered the service of John Frederick, Duke of Brunswick-Lüneburg, in Hanover, serving as librarian and court counselor to successive Hanoverian rulers for over four decades.

Image source: House of Hanover

Leibniz oversaw engineering efforts to improve silver mining in the Harz mountains, devising windmill and water-pumping schemes, and conducting geological studies that anticipated principles of earth history.

Image source: Harz

Commissioned to write a history of the Guelf dynasty, Leibniz spent three decades gathering archival materials, producing volumes on the origins of the house that were scholarly landmarks but never reached the intended period.

His patron George Louis became King George I of Great Britain, but Leibniz was left in Hanover rather than invited to London, partly due to the calculus controversy and court politics.

Image source: George I of Great Britain

Leibniz wrote the Discourse on Metaphysics, laying out key doctrines including the concept of monads, pre-established harmony, and the principle that God chose the best of all possible worlds.

Image source: Discourse on Metaphysics

Leibniz composed Protogaea, a pioneering work on geology and the formation of the Earth, proposing that fossils and rock strata record the planet's historical development — unpublished until long after his death.

Image source: Protogaea

Leibniz wrote a chapter-by-chapter response to Locke's Essay Concerning Human Understanding, arguing for innate ideas against empiricism; it was withheld upon news of Locke's death and published only in 1765.

Image source: An Essay Concerning Human Understanding

Leibniz published his Theodicy, the only major philosophical book he issued in his lifetime, addressing the problem of evil and defending the notion that our world is the best of all possible worlds.

Image source: Theodicy

Near the end of his life, Leibniz summarized his mature metaphysics in the Monadology, describing reality as composed of simple, immaterial substances called monads whose perceptions are harmonized by God without interaction.

Image source: Monadology

Through Princess Caroline of Wales, Leibniz began a famous exchange of letters with Newton's advocate Samuel Clarke debating space, time, free will, and divine intervention — cut short by Leibniz's death.

Image source: Leibniz–Clarke correspondence

Leibniz persuaded Elector Frederick III of Brandenburg to establish the Berlin Academy of Sciences, serving as its first president and championing organized scientific collaboration across Europe.

Image source: Prussian Academy of Sciences

Leibniz tirelessly advocated networks of academies in Vienna, Dresden, St. Petersburg, and elsewhere, promoting systematic exchange of knowledge among scholars throughout Europe.

Leibniz died in Hanover largely neglected by the court he had served for decades, attended only by his secretary; his funeral was sparsely attended despite his towering contributions to European thought.

Nearly fifty years after his death, Leibniz's New Essays on Human Understanding appeared in print, revealing the depth of his response to Locke and influencing later idealist philosophy.