Galois Cohomology

This English translation of "Cohomologie Galoisienne" includes significant updates from the original 1964 edition. It features new material such as a photographic reproduction of R. Steinberg's work on semisimple algebraic groups, a proof of the Golod-Shafarevich inequality, and summaries from Jean-Pierre Serre's later lectures on Galois cohomology. The bibliography has been expanded, open questions updated, and additional exercises included, while maintaining the original numbering for easy reference.