I think to some great extent, the fleeing from home that is done by the young is precipitated by the notion that what is old is passing away; this is confirmed, perhaps, when later the old way of life does die out. Barring a dearth of resources, the old way dies out because the young leave and for little other reason. Wendell Berry has warned that how we are telling the story of our lives is often the sole determiner of whether the young believe that what is old is passing away.