

A 17th-century intellectual whose radical philosophy of a living, unified cosmos directly influenced the great thinker Gottfried Wilhelm Leibniz.
Confined by chronic illness and the rigid social expectations of her era, Anne Conway crafted a metaphysical system of startling originality. Tutored by philosophers like Henry More, she engaged in deep correspondence with the leading minds of her day from her country estate. Her singular work, 'The Principles of the Most Ancient and Modern Philosophy,' written in secret and published only after her death, mounted a powerful critique of both René Descartes and Thomas Hobbes. Conway proposed a universe composed of a single, infinitely mutable substance, where spirit and matter are interconnected and every particle possesses life and perception. This vitalist monism, which rejected the mechanistic views gaining dominance, provided a crucial spark for Gottfried Wilhelm Leibniz's theory of monads. Her legacy is that of a profound, independent thinker whose ideas quietly helped shape the course of Western philosophy.
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She suffered from debilitating migraines throughout her life, seeking treatment from the controversial alchemist and physician Francis Mercury van Helmont.
She converted to Quakerism late in life, a radical and socially perilous move for a woman of her aristocratic standing.
Her philosophical notebook was written in English but first published posthumously in a Latin translation in 1690.
The only known portrait of her was drawn posthumously by van Helmont's son.
Her maiden name was Finch; she became Viscountess Conway through marriage.
“Every body is a kind of spirit and every spirit a kind of body.”