What is the likely future of NATO? Will the alliance survive the next seventy years? Which challenges will it have to deal with? This article gazes into the future and attempts to identify some plausible scenarios for the years ahead. I argue that NATO will persist, but that its relevance is dependent on its adaptability to emerging challenges. Furthermore, the foundational values and the solidarity must be thriving. If not, NATO will be but a paper tiger. In the short term, the strains across the Atlantic is the most worrying tendency. However, climate change, migration and the digital revolution of our societies are long-term trends that eventually will challenge NATO more profoundly.