God fortells a time when He will establish peace earth wide. Under His kingdom, a heavenly government, people will not "learn war anymore.". Instead they will beat their swords into plowshares. Isaiah 2:4
God will being an end to all injustice and suffering. The promises: "God will wipe out every tear from their eyes, and death will be no more, neither will mourning nor ourcry nor pain be any more. The former things (including todays injustices and sufferings) have passed away."