The passionately political thinker rose to prominence in the 1970s alongside Bernard-Henri Levy as one of the France's "New Philosophers", who broke with Marxism after street protests brought the country to the brink of revolution in 1968.
"My first and best friend is no more," wrote Raphael Glucksmann on Facebook, describing his father as "a good and excellent man".
Strongly influenced by the Russian dissident Alexander Solzhenitsyn's account of his time as a political prisoner in "The Gulag Archipelago", Glucksmann railed against Soviet totalitarianism in his book "The Cook and the Cannibal" (1975), setting him on a collision course with leftwing existentialist intellectuals led by Jean-Paul Sartre.
His friend, the writer and philosopher Pascal Bruckner, who has followed a similar path from left to right, told French radio that Glucksmann would be remembered for "delivering the staggering blow against communist thinking in France.
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"At the time he had an enormous number of enemies, of people opposing him, but he held on," he said.
"His ideas weren't just passing thoughts, they were real engagements which he physically stuck to every day."
He later supported US-led invasions of Iraq and Afghanistan, and lobbied on behalf of Chechen Muslims during their war with the Russian government in the 1990s, later warning against European appeasement of President Vladimir Putin.
"Recklessness and forgetfulness create the conditions for new catastrophes in both the economy and politics," he said.
French President Francois Hollande paid tribute to Glucksmann, who died yesterday, describing him as a man who "carried in him all the dramas of the 20th century... And spent all his life and intellectual training in the service of liberty.