1. What are the chief reasons for the mass migration to California? I think that the chief reasons for the mass migration to California where based on a few different reasons. The first reason was because everyone was poor. They didn't have enough money to have the most basic necessities in life. They would even go to such lengths as to steal a neighbors house. No body was happy living in Oklahoma. They all had such hard lives that no one had time to do what they wanted to do. It was farm from sun up to sun down. That is what everyone did, and they didn't even get that much compensation for all the devotion that t