Claremont worked with artist John Byrne on the story, which ran for two issues, Uncanny X-Men (Vol. 1) #141-142. “Days of Future Past” takes place in a dark future where the heroes have failed ...

It sets up a bright future for the X-Men, but Days of Future Past proves things don’t stay good for long. The Sentinels start attacking, sending mutants all over the world on the run.

Learning from the past to prepare for the future is critical for the well-being of individuals and societies. For a better future, a historical perspective needs to be cultivated.