Americans have more stuff/clutter than any other country in the world. We all have neighbors who have garages filled to the brim with boxes and clutter and they probably have no idea what is in there. Others have storage containers/pods on the driveway. But don't be fooled by those with empty garages, they may be renting a storage unit somewhere.
UCLA anthropologists take a look at over 30 homes where they study the items people collect and stockpile.