Declining fertility rates across the globe have been in the news lately. Peter notes that the Amish have a high fertility rate, that rate isn't dropping, and they pair this with an upbringing and coming-of-age ritual (Rumspringa) which results in a very high religious retention rate (those born Amish tend to stay Amish). How do they do this? Is this good? If it is good, is there anything the rest of us can learn from the Amish?