A common feeling of those in Angel Island was that the US police and military on Angel Island was evil and that they were oppressing those who wanted to enter the country. He would probably describe how they would often get beaten up or how disease would easily spread since they were on an island or how there wasn't enough food.
I think it would be climatic changes. After the ice age, lands became a good ground to plant food resources. People learned through experience, observation, and survival the basic things to survive the world and finally stopped in a place and build their own homes and finally settle. They learned that hunting is not enough to sustain their needs so they studied on cultivating their lands to produce their needed food.
The minimum age for a member of the House of Representatives is 25 years old.
