1001Philosophers

Leon Brunschvicg 1869 – 1944

Leon Brunschvicg was a French philosopher and the leading representative of French rationalist idealism in the first decades of the twentieth century. Long-time professor at the Sorbonne and a co-founder with Xavier Leon of the Revue de Metaphysique et de Morale, he taught a generation of French philosophers including Sartre, Beauvoir, Cavailles, and Levinas. His Stages of Mathematical Philosophy, Human Experience and Physical Causality, and The Progress of Consciousness in Western Philosophy articulated a philosophy in which the unity of mind reveals itself in the historical progress of mathematics and physics. Of Jewish origin, he died in hiding from the German occupiers in Aix-en-Provence.

Key facts

Nationality
French
Era
Contemporary
Movements
Continental, Rationalism

Selected quotes

  • Attributed to Leon Brunschvicg:

    “The history of mathematics is the autobiography of the human mind.”

  • Attributed to Leon Brunschvicg:

    “Reason is what the human spirit has done, not a faculty given once for all.”

  • Attributed to Leon Brunschvicg:

    “Self-knowledge is achieved in the works of intelligence, not in introspection.”

  • Attributed to Leon Brunschvicg:

    “Science is the laboratory in which philosophy meets reality.”

  • Attributed to Leon Brunschvicg:

    “Each great theory in physics widens our notion of what it is to be.”