This open access book explores how UN peace operations are adapting to four transformational trends in the changing global order: (1) the rebalancing of relations between states of the global North and the global South; (2) the rise of regional organisations as providers of peace; (3) the rise of violent extremism and fundamentalist non-state actors; and (4) increasing demands from non-state actors for greater emphasis on human security. It identifies emerging conflict and peace trends (robustness of responses, rise of non-state threats, cross-state conflicts) and puts them in the context of tectonic shifts in the global order (rise of emerging powers, North–South rebalancing, emergence of regional organisations as providers of peace). The volume stimulates a discussion between practitioners and academics from the global North and South, and offers an analysis of how the international community collectively makes sense of the changing global order and its implications for UN peace operations.