Two centuries ago, Romantic-era poets like William Wordsworth were aesthetically aware of nature’s powerful effects on our emotions, our creativity and our overall well-being. “Come forth into the light of things/Let Nature be your teacher,” Wordsworth wrote in “The Tables Turned” in 1798. Today, science empirically confirms what the poets knew so well, says Florence Williams in The Nature Fix: Why Nature Makes Us Happier, Healthier, and More Creative (W.W. Norton & Co., 2017).