Inheriting space permissions from another space would allow space permissions to be set at one location, allowing a single point of management of permissions for a set of spaces from a "master" space.

Ideally, in the daughter space, these inherited permissions would be displayed greyed-out and unchangeable, but can be appended with additional permissions (i.e., setting an additional space administrator or expanding rights for an inherited group). If the inheritance link is broken, the option to copy or remove inherited permissions is given, and if copied, it would be the OR'ed set if there are any additional permissions.