Why are people in okievilles called okies?

People in Okieville, or more broadly in Oklahoma, are often referred to as "Okies" due to a historical context stemming from the Dust Bowl era in the 1930s. Many displaced farmers from Oklahoma migrated to California and other states in search of better living conditions, and they were labeled "Okies" both as a term of identity and sometimes as a derogatory term. Over time, "Okie" has evolved into a more neutral or even affectionate term for residents of Oklahoma.