The future looked bright despite the rain on Tuesday evening at the Museum of Modern Art, where guests — including Elon Musk and Seth Meyers — gathered for a screening of a new PBS documentary series, “A Brief History of the Future.”Mr. Musk, flanked by security, came with a preschooler in tow, his 3-year-old son, X Æ A-12, who is better known simply as X. (Same as Mr. Musk’s social media platform.) X’s mother, the musician Grimes, is featured in the documentary series, which follows innovators who are trying to tackle some the world’s most pressing problems, like climate change and pollution. The documentary, as the title might suggest, centers on futurism. Its adherents approach these obstacles and challenges with a distinct sense of optimism.

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Persons: Elon Musk, Seth Meyers —, Mr, Grimes Organizations: Museum of Modern Art, Elon, PBS