How do you reconcile world (κόσμος) in 1 John 2:15-17 with John 3:16-17?

How do you reconcile world (κόσμος) in 1 John 2:15-17 with John 3:16-17? κόσμος has obviously different meanings as used in the following two passages. For God so loved the world, that he gave his only Son, that whoever believes in h…