Christopher Agamemnon Pallis (2 December 1923, Bombay – 10 March 2005, London) was an Anglo-Greek neurologist and socialist intellectual. Under the pen-names Martin Grainger and Maurice Brinton, he wrote and translated for the British libertarian socialist group Solidarity from 1960 until the early 1980s. As a neurologist, he produced the accepted criteria for brainstem death, and wrote the entry on death for Encyclopædia Britannica.
Chris Pallis was born to a prominent Anglo-Greek family, "of whose intellectual achievements he was always extremely proud". The poet Alexandros Pallis was a great-uncle, and so the writers Marietta Pallis and Marco Pallis were also relatives. His father Alec was general manager of the family firm of merchant bankers, Ralli Brothers; when he retired, he returned from India to settle in Switzerland. Educated there, Chris Pallis became fluent in French, English and Greek.
In 1940 the family managed to take the last boat out of France, and settled in England. Pallis went up to study medicine at Balliol College, Oxford in 1941. Joining the Communist Party of Great Britain, he was quickly expelled for criticising its policy on the Second World War, and became a member of the Trotskyist Revolutionary Communist Party.
In 1947 he married Jeanne Marty, a working-class French university student, and for a decade he dropped out of politics to pursue his medical career. In 1957 he joined the Trotskyist group led by Gerry Healy, the Club, which in 1959 became the Socialist Labour League. He was expelled by Healy in 1960 and with a group of other ex-members of the SLL immediately set up Solidarity. Like a number of other former members of the SLL he was also involved with the journal International Socialism in the early 1960s.