Justice Sheilah Martin announced earlier this year that she would retire from the Supreme Court of Canada, effective May 30, 2026. The announcement was somewhat surprising. Justice Martin was still five years away from her mandatory retirement date, and her successor has not yet been appointed.
Even before that appointment is made, it is worth considering what impact Justice Martin’s retirement might have on the Court.
At one level, that question is impossible to answer with confidence. The Supreme Court is a complex institution composed of nine judges with roughly equal formal authority. A judge’s influence on the development of the law depends not only on their judicial philosophy and areas of interest, but also on their relationships with colleagues, their ability to persuade, and their capacity to form coalitions in particular cases. Isolating and describing the effect of a single judge’s departure is inherently difficult.
