
This intriguing book explores the reasons why people migrate: pushes - involuntary migrations - and pulls - voluntary migrations. The different causes include: population density or lack of resources; colonization and empire building; independence from colonization, population...

This intriguing book explores the reasons why people migrate: pushes - involuntary migrations - and pulls - voluntary migrations. The different causes include: population density or lack of resources; colonization and empire building; independence from colonization, population...