What vision of the contemporary world is implied by the metaphors in the first half of "The Second Coming"?
I think by far the most profound image of the poem that it begins with is of the falcon turning and turning in an ever-widening gyre as it seeks to escape the control and influence of its falconer:
Turning and turning in the widening gyre
The falcon cannot hear the falconer...
If we examine this image carefully, we can say that the falcon and the falconer in their relationship symbolise order and control. However, the breakdown of this relationship clearly suggests that irrationality and chaos is replacing order and control in the contempoary world, as the falcon is not responsive to the falconer and circles further and further away from him. It is this that cuases the loosing of the "blood-dimmed tide" and the drowning of "the ceremony of innocence," two other very strong images that point towards a future of savagery, chaos and violence.