What are the similarities and differences between modern biographies and the earliest biographies?

In comparison, the modern biographies today often narrates and give ideas to the public or the reader about the author or it can be the subject of the biography and states its life and explain everything in a detailed and true information. In addition they don't tend to criticize but only gives an information. While in an earliest kind of biography is somewhat use in judging or criticizing a persons it in a kind of manner that could affect the subject way of life.

Early biographies tended to criticize or praise the person. Good biographies today are nonjudgmental.