Based on individual variation in cooperative inclinations. we define the "hard problem of cooperation" as that of achieving high levels of cooperation in a group of non-cooperative types. Can the hard problem be solved by institutions with monitoring and sanctions. In a laboratory experiment we find that the answer is affirmative if the institution is imposed on the group but negative... https://www.roneverhart.com/Brach-s-Natural-Sources-Candy-Corn-10-Ounce-Bag/