Kerensky, the leader of a relatively moderate socialist party, proclaimed a policy of "no enemies to the left" and, as a result, released Vladimir Lenin from prison, where he'd been interned for his failed attempt to overthrow Kerensky's own government in July of that year. And so, three months later, an emboldened Lenin tried again and succeeded, with catastrophic results for the entire century.

Republican leaders in America today have, in effect, declared a policy of "no enemies to the right." With very few exceptions, they have declined to impeach or even criticize Donald Trump for inciting the attempted insurrection of Jan. 6. They have awarded a House committee seat to Rep. Marjorie Taylor Greene, who believes in QAnon's wildest conspiracy theories, who has told right-wing protesters they should feel free to use violence, and, before she was elected to the House this past fall, called for the assassination of Democratic leaders, including House Speaker Nancy Pelosi. Several GOP lawmakers still refuse to acknowledge that President Joe Biden fairly won the November election.