Full Idea
The 'one over many' problem is to explain how universals can unify their instances if they are wholly other than them.
Gist of Idea
How can universals connect instances, if they are nothing like them?
Source
Cynthia Macdonald (Varieties of Things [2005], Ch.6)
Book Reference
Macdonald,Cynthia: 'Varieties of Things' [Blackwell 2005], p.240
A Reaction
If universals are self-predicating (beauty is beautiful) then they have a massive amount in common, despite one being general. You then have the regress problem of explaining the beauty of the beautiful. Baffling regress, or baffling participation.