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Why do we form social hierarchies? From corporate ladders to military chains of command, formal caste systems to playground pecking orders, humans are particularly sensitive to social status. And we display our rank in all sorts of ways, even without realizing it - through our posture, vocal pitch, and patterns of eye contact. Join Dessa to learn how social hierarchies are formed, how they might be dismantled, and the many ways in which they colour our daily exchanges. Image: Climbing ladders (Credit: Eric Meola/Getty Images Creative)