In Abrahamic religions, the Messianic Age (עוֹלָם הַבָּא ʿŌlām haBāʿ, “the World to Come”; الآخِرَة al-ʿĀḵira, “the Hereafter”) is the future period of time on Earth in which the messiah will reign and bring universal peace and brotherhood, without any evil. Many believe that there will be such an age; some refer to it as the consummate "kingdom of God" or the "world to come". Jews believe that such a figure is yet to come, while Christians and Muslims believe that this figure will be Jesus.
According to Jewish tradition, the Messianic Era will be one of global peace and harmony; an era free of strife and hardship, conducive to the furtherment of the knowledge of the Creator. The theme of the Messiah ushering in an era of global peace is encapsulated in two of the most famous scriptural passages from the Book of Isaiah:
They shall beat their swords into plowshares and their spears into pruning hooks; nation will not lift sword against nation and they will no longer study warfare.
The wolf will live with the lamb, the leopard will lie down with the goat, the calf and the lion and the yearling together; and a little child will lead them. The cow will feed with the bear, their young will lie down together, and the lion will eat straw like the ox. The infant will play near the hole of the cobra, and the young child put his hand into the viper's nest. They will neither harm nor destroy on all my holy mountain, for the earth will be full of the knowledge of the Lord as the waters cover the sea.
In his Mishneh Torah, Maimonides describes the Messianic Era:
"And at that time there will be no hunger or war, no jealousy or rivalry. For the good will be plentiful, and all delicacies available as dust.
The entire occupation of the world will be only to know God... the people Israel will be of great wisdom; they will perceive the esoteric truths and comprehend their Creator's wisdom as is the capacity of man. As it is written (Isaiah 11:9): "For the earth shall be filled with the knowledge of God, as the waters cover the sea.