“O tempora! O mores!” (Oh, the times! Oh, the customs!) — Roman statesman and orator Cicero IN today’s social media landscape, “echo chamber” has become a buzzword. At first, it sounded strange to a baby boomer like me. The Oxford Dictionary broadly defines an echo chamber as an environment where a person encounters only the beliefs and opinions that mirror their own, reinforcing existing views while filtering out alternative ideas. Online, we are flooded with information from Facebook,...