What do Covid-19, the Russian invasion of Ukraine, and the climate crisis have in common? All three challenge our sense of safety and illuminate the interconnected nature of the modern world. Each also calls for a reconsideration of boundaries between government and business, and the appropriate balance between competition and cooperation in business — and in antitrust law. In some jurisdictions, antitrust authorities see climate cooperation as a means to support greener economies; elsewhere, their counterparts see them as a violation of antitrust law that must be stopped.