Do We Need 'Social Domain' Licenses?

I am proposing the ‘social domain’, inbetween proprietary and commons rights systems.

By analogy: If copyright is an island, and public domain is the ocean, the social domain is for whatever happens when you want to write something inbetween the high water mark and the low water mark, which can be fraught.

So, the social domain consists of all the creative work to which rights apply to individual, natural persons, smaller commercial businesses, non-profit (voluntary) organizations and civic institutions, created under the Berne Convention and covered by a country’s copyright laws

Work can be actively dedicated to the social domain with permission from originators using a licensing scheme.

The social domain differs from ‘public domain’, ‘public sphere’ or ‘commons’ in that the works are still under a license.

Does anyone even need it?