From our earliest wanderings to the rise of the digital nomad, here is the story of human migration.For hundreds of thousands of years, the ability of Homo sapiens to travel across vast distances and adapt to new environments has been key to our survival as a species. Yet this deep migratory impulse is being tested as never before. By building ever stronger walls and raising barriers to progress, governments are harming the lives of migrants and threatening the future well-being of our societies