Full Idea
Ontological dependence is better understood in terms of an essential connection, rather than simply a necessary connection.
Gist of Idea
Ontological dependence rests on essential connection, not necessary connection
Source
George Molnar (Powers [1998], 1.4.4)
Book Reference
Molnar,George: 'Powers: a study in metaphysics', ed/tr. Mumford,Stephen [OUP 2003], p.38
A Reaction
This seems to be an important piece in the essentialist jigsaw. Apart from essentialism, I can't think of any doctrine which offers any sort of explanation of the self-evident fact of certain ontological dependencies.