The lesson is that to create thick pluralistic society, you first have to help people embed in a secure base. That includes economic and health care security, but it also involves cultural and spiritual security. It involves offering people opportunities to embed in their local culture, to practice their particular faith, to live by local values that may seem alien to you and me.
Only people who are securely rooted in their own particularity are confident enough to enjoy the encounter with difference.
This is the paradox of pluralism: In order to get people to integrate with others you have to help them weave close communities with their own kind. Cosmopolitans never get this.
A person who is firmly rooted can go out and enjoy the adventure of pluralism. This is the second phase of thick pluralism.