Migration has not been deterred because of the fact that Britain and Japan are islands. These are the world's most wealthiest islands.
Step-by-step explanation:
The fact that these islands are not well connected by land routes has not affected migration. Migration has not been deterred to and from the islands. In fact, because of several employment opportunities and availability of more resources in these islands has enabled migration. A lot of people have migrated and still do to these islands to enjoy a better standard of living.