Their long history of violent conflict , extending well into the twentieth century , has meant dramatic changes in their way of life .
Seventeenth - and eighteenth - century historians described the Hiwi as nomadic hunter - gatherers .
hunter - gatherers ' long history of violent conflict , extending well into the twentieth century , has meant dramatic changes in their way of life .
Seventeenth - and eighteenth - century historians described the Hiwi as nomadic hunter - gatherers .