Bret Stephens: The encroachment of the unsayable

In January, in what now seems like a bygone age, writer George Packer delivered a memorable speech, “The Enemies of Writing,” for the honor of winning the Hitchens Prize. “Why is a career like that of Christopher Hitchens not only unlikely but almost unimaginable?” Packer asked. “Put another way: Why is the current atmosphere inhospitable to it? What are the enemies of writing today?”For a sense of what Packer meant, consider that in 2007 Hitchens wrote &mdash