Full Idea
Qualified modalities seem to form a hierarchy, if we say that 'the possibility that there might be no hunger' is possible logically, theoretically, physically, economically, and humanly.
Gist of Idea
Possibilities can be logical, theoretical, physical, economic or human
Source
Rod Girle (Modal Logics and Philosophy [2000], 7.3)
Book Reference
Girle,Rod: 'Modal Logics and Philosophy' [Acumen 2000], p.114
A Reaction
Girle also mentions conceptual possibility. I take 'physically' to be the same as 'naturally'. I would take 'metaphysically' possible to equate to 'theoretically' rather than 'logically'. Almost anything might be logically possible, with bizarre logic.
Related Idea
Idea 12653 There's statistical, logical, nomological, conceptual and metaphysical possibility [Fodor]