Analysis of "The Second Coming"?

Yeats wrote the poem in 1919 after the First
Great War, but because of the Cristian imagery of the Apocalypse and the Second Coming,
and its terrifying, ritualistic language, the poem is an obscure allegory open to
several interpretations. May be that the poem looks simple in its structure, the first
stanza describing the present conditions of the world-the state of disintegration and
fragmentation as in things falling apart, anarchy being loosed, and the second stanza
surmising that a monstrous Second Coming is about to take place, not of the Jesus as we
knew, but of a new messiah, a “rough beast,” the slouching sphinx rousing itself in the
desert and lumbering toward Bethlehem.

The opening lines
describe a nightmarish scene: the falcon, turning in a widening “gyre” (spiral), cannot
hear the falconer. Those who are the best lack all conviction, while the worst are "full
of passionate intensity".

Then the poet/speaker asserts
that the ''second coming'' is about to come. But he is troubled by “a vast image of
the Spiritus Mundi, or the collective spirit of mankind: somewhere
in the desert, a giant sphinx is moving, while the shadows of desert birds reel about
it. What “rough beast,” he wonders "slouches towards Bethlehem to be
born?”