Welcome back. I love the best-of lists that come at New Year's. We get to reflect on what's happened and think about how the past is prologue to the year to come. For this issue, I've created my own best-of list from the most-shared and discussed stories in my network. They help me reflect on all we've learned this year, and especially on how grateful I am for your readership and engagement. Before we get to the article, I want to say thank you! Having you here helps me keep writing. Here's...