People who have reached this stage of development are concerned with the innate rights of humans and guided by their own ethical principles.
(People; have reached; this stage of development) (People who have reached this stage of development; are concerned; with the innate rights of humans) (People who have reached this stage of development; guided; by their own ethical principles)
People People who have reached this stage of development People who have reached this stage of development
have reached are concerned guided
this stage of development
with the innate rights of humans
by their own ethical principles