Social networks play an outsized role in societies and economies. No filter by Sarah Frier looks at the influence of Instagram and how its early idealism was lost after its acquisition by Facebook. You get a front row seat to the unfolding drama between the King of Social Media Mark Zuckerberg and the upstart Kevin Systrom. And while there are lots of lessons here for entrepreneurs, co-founders, or early employees in a startup, the biggest lessons for us is how the personalities at the top of these companies make decisions that have huge unintended consequences for all of us.