There are Ice Ages of varying severity every 10-20 thousand years. We just left a fairly severe one approximately 10 thousand years ago, a mini-one ended approximately 200 years ago. So clearly we are headed toward another on the question is how far out and how severe. Its possible in 200 years our descendants might wish Global Warming was real!
My personal preference is gradual warming over rapid cooling but I have a feeling my wishes are insignificant...