1755 Lisbon earthquake

The 1755 Lisbon earthquake took place on November 1, 1755, at 9:20 in the morning. It was one of the most destructive and deadly earthquakes in history, killing well over 100,000 people. The quake was followed by a tsunami and fire, resulting in the near total destruction of Lisbon. The earthquake accentuated political tensions in Portugal and profoundly disrupted the country's 18th century colonial ambitions. The event was widely discussed by European Enlightenment philosophers, and inspired major developments in theodicy and in the philosophy of the sublime. The first to be studied scientifically for its effects over a large area, the quake signalled the birth of modern seismology. Geologists today estimate the Lisbon earthquake approached magnitude 9 on the Richter scale, with an epicenter in the Atlantic Ocean about 200 km west-southwest of Cape St. Vincent.

Social and philosophical implications

The earthquake shook much more than cities and buildings. Lisbon was the capital of a devout Catholic country, with a history of investments in the church and evangelism in the colonies. Moreover, the catastrophe struck on a Catholic holiday and destroyed almost every important church. For 18th century theology and philosophy, this manifestation of the anger of God was difficult to explain.

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The earthquake strongly influenced many thinkers of the European Enlightenment. Many contemporary philosophers mentioned or alluded to the earthquake in their writings, notably Voltaire in Candide and in his Poème sur le désastre de Lisbonne (Poem on the Lisbon disaster). The arbitrariness of survival motivated Voltaire's Candide and its satire of the idea that this was "the best of all possible worlds"; as Theodor Adorno wrote, "he earthquake of Lisbon sufficed to cure Voltaire of the theodicy of Leibniz" (Negative Dialectics 361). In the later twentieth century, following Adorno, the 1755 earthquake has sometimes been analogized to the Holocaust as a catastrophe so tremendous as to have a transformative impact on European culture and philosophy.

Related Topics:
Europe - Enlightenment - Philosophers - Voltaire - Candide - Poème sur le désastre de Lisbonne - Theodor Adorno - Theodicy - Leibniz - Holocaust

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The concept of the sublime, though it existed before 1755, was developed in philosophy and elevated to greater importance by Immanuel Kant, in part as a result of his attempts to comprehend the enormity of the Lisbon quake and tsunami. Kant published three separate texts on the Lisbon earthquake. The young Kant, fascinated with the earthquake, collected all the information available to him in news pamphlets, and used it to formulate a theory of the causes of earthquakes. Kant's theory, which involved the shifting of huge subterranean caverns filled with hot gases, was (though ultimately shown to be false) one of the first systematic modern attempts to explain earthquakes by positing natural, rather than supernatural, causes. According to Walter Benjamin, Kant's slim early book on the earthquake "probably represents the beginnings of scientific geography in Germany. And certainly the beginnings of seismology."

Related Topics:
Sublime - Immanuel Kant - Walter Benjamin

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Werner Hamacher has claimed that the earthquake's consequences extended into the vocabulary of philosophy, making the common metaphor of firm "grounding" for philosophers' arguments shaky and uncertain: "Under the impression exerted by the Lisbon earthquake, which touched the European mind in one its more sensitive epochs, the metaphorics of ground and tremor completely lost their apparent innocence; they were no longer merely figures of speech" (263). Hamacher claims that the foundational certainty of Descartes' philosophy began to shake following the Lisbon earthquake.

Related Topics:
Werner Hamacher - Descartes

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In Portuguese internal politics, the earthquake was devastating. The Prime Minister was the favorite of the King, but the aristocracy despised him as an upstart son of a country squire. (Although the Prime Minister Sebastião de Melo is known today as Marquis of Pombal, the title was only granted in 1770, fifteen years after the earthquake). The Prime Minister in turn disliked the old nobles, whom he considered corrupt and incapable of practical action. Before November 1, 1755 there was a constant struggle for power and royal favour, but afterwards, the competent response of the Marquis of Pombal effectively severed the power of the old aristocratic factions. Silent opposition and resentment of King Joseph I began to rise. This would culminate in an attempted assassination of the King, and the elimination of the powerful Duke of Aveiro and the Távora family.

Related Topics:
Marquis of Pombal - 1770 - Duke of Aveiro - Távora family

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