"Today, there are over 258 million migrants around the world living outside their country of birth. This figure is expected to grow for a number of reasons including population growth, increasing connectivity, trade, rising inequality, demographic imbalances and climate change. Migration provides immense opportunity and benefits – for the migrants, host communities and communities of origin. However, when poorly regulated it can create significant challenges. These challenges include overwhelming social infrastructures with the unexpected arrival of large numbers of people and the deaths of migrants undertaking dangerous journeys."
https://refugeesmigrants.un.org/migration-compact