> I don't understand how they suddenly became tougher, just by stepping on a boat. I don't understand the OP's point, but "selection bias" is why many immigran

> I don't understand how they suddenly became tougher, just by stepping on a boat. I don't understand the OP's point, but "selection bias" is why many immigrant populations out-perform their counterparts back home. The folks who are willing to strike out are necessarily more intrepid.