How should middle powers such as Australia and Canada maximise their strategic clout in an age of increasingly assertive great powers? Raquel Garbers spent nearly three decades in Canadian defence, security and intelligence, including a stint as Director General for Strategic Defence Policy at the Canadian Department of National Defence, where she served as the principal architect of Canada’s defence policy. As an ASPI Non-Resident Senior Fellow, Raquel brought that experience to last week’s ASPI Defence Conference, where she made a memorable contribution on the role of middle powers in an age of uncertainty. Raquel has watched up close what Donald Trump has meant for the US-Canada relationship. But she's clear-eyed about the limits of what democratic middle powers can achieve without US alignment, and unsentimental about the fact that great powers are great powers. Her answer to that challenge is what she calls "coalitions of the capable": flexible, fast and fierce groupings of like-minded states that can maximise their collective agency. It's a realistic and pragmatic framework for navigating a world that looks very different from the one the post-war order was built for—and a conversation that reflects the enormous importance of these questions for the fates of middle powers such as Australia.