The most prominent one would be the absence of a leisure drug culture in positions of high office centered on the president and his pals such as Tyson. We will never know the full damage done by the Little Rock orgy and drugs culture that grew up around Clinton and his pals being plugged into the nation's highest offices with all of its defensive, lying accusations (i.e., it wasn't us because we lied about it being the Bush brothers so you would never look at us and then we used our power to make sure the FBI would never be able to use its background-checking power to find out the truth). But it is for sure the case that having George W. and Laura Bush in the White House and a president who actually believes rather than one who swings a Bible as a cover for BJ's with interns has done an enormous amount to reduce drug usage. Further, having a real enemy, an enemy that must be led against to be defeated, with such a President in charge, tends also to elimiinate the moral and spiritual vacuum that leads to much of the drug use contributes.