Re: “Next five years are make-or-break for runaway climate change,” (The Hill Times, Dec. 10, p. 4, by Gwynne Dyer.). Only by increasing our ambition to mitigate the worst impacts of climate change, can humanity truly survive in any recognizable form of today’s civilization. We need to do more, not less. Yet today’s political climate is in effect forcing us to do less, not more. This is a calamity in itself.