Sir Peter Medawar (1915 - 1987) was a British zoologist of Arabic heritage (his father was Lebanese). He won the Nobel Prize in Medicine for his work on acquired immune tolerance.
Thomas Hobbes (1588-1679) was an English philosopher particularly noted for his political theories.
His book Leviathan is concerned with the structure of society and government. It is the earliest example of social contract theory (theories about the ways people organise and maintain order in societies).
Huntington's Disease is a hereditary disorder of the central nervous system. Degeneration of brain neurons causes loss of muscular control and emotional disturbance. There is currently no cure.