Emma Chao/Scary Mommy; GettyI think most parents today have that moment, that story we share: Where were you on September 11, 2001? In the same way my parents told me about the assassinations of JFK and MLK or the moon landing, everyone was impacted—even if we weren’t directly involved. These cultural moments ripple out in each generation; they shape us and define us in ways we will likely always struggle to fully describe. Their impact is irrefutable, though.These are those flashpoints where everything shifts, and they are particularly impactful when they occur before we reach adulthood. Whil...