Did you notice this? Harry's three kids (James II, Albus, and Lily II) are the first generation of Potters to have lived in peace and not get involved in wars unlike the previous generations of Potters:
Their parents (Harry and Ginny) were born during the last years of the first wizarding war and they both played an active part in the second wizarding war as members of the Order of the Phoenix and Dumbledore's Army.
Their paternal grandparents (James and Lily) were heavily involved and active during the first wizarding war as members of the Original Order of the Phoenix.
Their paternal great-grandparents were either heavily involved in the Global Wizarding War against Grindelwald (James's parents) or were WW2 veterans (Lily's parents).
Their paternal great-great-grandfather (James's grandfather) tried to convince the ministry of magic to use magic to help muggles fighting in WW1 and publicly condemned the minister of magic for refusing to do so (and thereby leading the Potter family to be banished from the Sacred 28).
Please tell me what you think of this!