Personally i dont think there is an end to the world. I think the earth is a ever-changing planet. Species get whipped out and new ones take over, over and over. Thats all life is anyway. survival.
I agree, the cycle philosophy, just as the Sun circles the Earth, everything in life comes in cycles. So what we may perceive as the end of the world, could in fact be a fresh start. An entire new life form gets a chance.