Turns out that the antiquarian Horace Walpole coined the word “serendipity. It is first found in a letter dated 28 January in 1754 that he sent to the American politician and education reformer Horace Mann. Mann, as anyone who follows my blog knows, was also a fervent Unitarian and a founder of the First Unitarian Society in Newton, where I served as minister for a bunch of years. The pleasant coincidences just pile up…