what is the basic theme of the poem the second coming

The basic theme of the poem "The Second Coming" by William Butler Yeats is apocalypse and the death of the old world, to be followed by the rebirth of a new one. The poem is full of foreshadowing and grandiose, dramatic premonitions that do not necessarily make the future much clearer. The poem modifies the Christian idea of the "Second Coming" to imply that the world is returning back to how it was before Christianity: without religious morality to guide it, and without an ethical compass to lead it into the future. The poem presents the main ideas of the prophecy of the future, violence, and meaninglessness. The world is constantly altered through violence and chaos, and humanity has become disillusioned and has loosened away from its center. The poem describes a world of chaos, confusion, and pain, and imagines the speaker receiving a vision of the future, but this vision replaces Jesuss heroic return with what seems to be the arrival of a grotesque beast.