What void? People that are WEIRD (Western Educated Industrilized Rich Democratic) or from predominately WEIRD countries never win anything anyway. Our best hope is to recruit from poor, third world countries and convert them into 'Mericans. Then, and only then, do we have a shot at wins in distance events at the Olympic / World XC / World Track Champs / Diamond League. Like all problems in the US and the World this can be blamed on the entitlement generation (aka boomers, aka those born 1946-1964) and their piss poor leadership / parenting.
Your welcome.