India, Oct. 3 -- Migration is often seen as a crisis, with headlines on "refugee floods" and tightened borders. But without it, continents would be empty, cultures stagnant, food bland, and cities lifeless

Migration is often treated as a crisis of the present. The newspaper headlines warn of refugee "floods", debates rage about borders, governments tighten visas. But take a step back and ask yourself: What if the migration had never happened at all? What if the people, crops and ideas had stayed rooted forever in their places of origin? The answer is both unthinkable and strangely illuminating.

Empty Continents

Without migration, humans would never have left Africa. The Americas, Europe, Asia and Australia would remain silent landscape...