Ian Buruma explores the life and death of Baruch Spinoza, the Enlightenment thinker whose belief in freedom of thought and speech resonates in our own time.

"Crisis has a way of laying bare our truest selves: who we trust, which principles and impulses we heed, whose lives we deem expendable. As it ravaged millions of lives, the Covid-19 pandemic revealed and accentuated the dividing lines that had already, for decades, splintered American public life. Against the backdrop of the 2020 presidential election, misinformation regimes, and the transformation of the facemask into a flagrant political symbol,...