As humanity expands its presence into space and ultimately settles beyond earth permanently, what freedoms can people expect? On the one hand space offers an escape from the traditions and entrenched patterns on Earth. On the other hand, how can you be free when the air you breathe comes from a manufacturing process controlled by someone else? In four essays, Charles Cockell explores the nature of extra-terrestrial liberty, one of the most pressing discussions in the future of political philosophy. Charles Cockell is Professor of Astrobiology at the University of Edinburgh. He has previously worked at the British Antarctic Survey and NASA and is Director of the UK Centre for Astrobiology.