Mark Oppenheimer is a friend of this podcast who is a signatory to a recent open letter published by Harper's Magazine, in praise of open debate and tolerance for differing opinions, and against some aspects of 'cancel culture', dogmatism and censoriousness. In this conversation with Bart Campolo, Mark chats about why he signed the letter, the limits and boundaries of free speech, the likeliest paths to progress, the effects of added scrutiny on writers at present and some of the reasons he thinks liberals have gotten less 'liberal'.