[tim333]

Thinking about it consciousness no doubt got there through evolution, as did other aspects of animal life, and functionally, if you think about something like a deer, it increases its survivability to be aware of what's going on, where it is, if there's a predator near, should it run away etc. The inputs are billions of sensory and memory neurons and that info has to be filtered down to something like a situation summary so other parts of the brain can make a decision like whether to stay eating or run. I presume consciousness is basically the situation summary.