Unconcerned

Un`con*cerned" (?), a. Not concerned; not anxious or solicitous; easy in mind; carelessly secure; indifferent; as, to be unconcerned at what has happened; to be unconcerned about the future. -- Un`con*cern"ed*ly (#), adv. -- Un`con*cern"ed*ness, n.

Happy mortals, unconcerned for more.
Dryden.