This briefing provides a summary of a recent paper in Nature Climate Change, written by Professor Myles Allen, Drivers of Peak Warming in a Consumption Maximising World. Professor Allen, Co-Director of the Oxford Martin Programme on Resource Stewardship, asks 'How hot does it get in a world of classical economist?' and goes on to examine the implications of following a classical cost-benefit approach to climate change mitigation. He concludes that early investment in carbon capture and storage technologies is vital for limiting peak warming. The briefing explains why in two pages.