Christmas movies thrive on the sense that we’re all in this together, “fellow passengers to the grave” as Charles Dickens put it. That sense was common in the 1940s and ’50s, an era that produced some of our best Christmas movies. That’s in stark contrast to today, an era so steeped in self-glorification that the most popular genre is the superhero movie, which is all about expressing the self at all costs, even if it means the routine destruction of entire city blocks. So, coming when it does, “The Man Who Invented Christmas” is not just a good movie but a welcome relief.