How and why did social divisions change significantly from the ancient western world to the feudal period to the early modern era? In particular, how did elements of identity like status, gender, and citizenship change across these periods?

Prompt:

How and why did social divisions change significantly from the ancient western world to the feudal period to the early modern era? In particular, how did elements of identity like status, gender, and citizenship change across these periods? Explain your answer with specific examples.
Essays should be at least five full paragraphs.