Stages of humanity and the construction of prehistory

Read the articles below (attached), then answer the following question.
Marquis de Condorcet, Outline of a Historical View of the Progress of Mankind (1795), 3-20
Johann G. Herder, Another Philosophy of History (1774), 3-16, 18-26.
Auguste Comte, Positive Philosophy, vol.1, pp.1-5; vol.3, pp.1-15
Question – “Comte, Condorcet, and Herder all propose theories of history that rely on stages. How different are these stages that they each present? Focus on the language they use to describe progress, or else on their different understandings of human nature.”