Arrival Cities, book by Douglas Saunders

From the YouTube description:
"Journalist and author Doug Saunders, talks to Allan Gregg about his new book "Arrival City", which examines the global trend of urban migration and argues that immigration will be critical to the success of economics in Canada and around the world."

One of the huge changes in human life in the last few hundred years is the shift from rural to urban life. This is occurring everywhere, sometimes at an enormously accelerated pace (as in China today).I'm eager to read this book.