John David Brewer HDSSc, MRIA, FRSE, FAcSS, FRSA (born 1951) is an Irish-British sociologist who was the former President of the British Sociological Association (2009–12), and has been the Professor of Post Conflict Studies in the at Queen's University Belfast (2013–present), Honorary Professor Extraordinary, Stellenbosch University (2017–present) and Honorary Professor of Sociology, Warwick University (2021–present). He was formerly Sixth-Century Professor of Sociology at the University of Aberdeen (2004–13). He is a member of the United Nations Roster of Global Experts for his work on peace processes (2010–present). He was awarded an honorary doctorate in 2012 from Brunel University for services to social science.