Answer:
Civilians contributed to the war in these ways:
adding to the food supply of the nation through victory gardens
participating in the manufacturing of military goods and weapons
purchasing war bonds
Im going to assume racism played a role in African American protests
The earliest documented evidence lies in the form of fossilized animal remains.
These remains helped the archaeologists and anthropologists discover numerous new things including the existence of paleo indians in the region which lived in a hunter gatherer society as far back as 10 000 years BC. This was way before the currently known tribes of Natives were discovered.
One interesting feature of the US constitution is that it is, divided into only three distinct articles and is one of the longest documents of its type.