John Alexander Stewart, the son of a farmer, was born in the early 1931 at Killinchy, Co. Down, Northern Ireland. He moved to London in the 1950s.
Based in London, John Stewart was a prolific author, whose work provides interesting comprehension of politics and economics. His body of work includes two biographies, Standing for Justice and A Promise Kept. Both works aim to examine notable historical figures that greatly interested Stewart. Standing for Justice discusses the radical Andrew McLaren and his approach to managing the social injustices of the 19th and 20th century whilst A Promise Kept details the work of Tom Chapman as a trade unionist, who acted in face of great adversity at times.