There was talk of war — past conflicts, and current ones — and pleas for peace. There was a painful reminder of the recent death of Alexei Navalny. There were protests outside the Dolby Theatre, calling for a cease-fire in Gaza. And there was a bit of election-year politics, too, from host Jimmy Kimmel. But the Oscars telecast is always a chaotic mix of moods and tones, and so even on a night ruled by somber themes, where the academy crowned a film about the the atomic bomb, there was also a jolt of joyful silliness when Ryan Gosling took...