Business culture demands optimism. Peak Oil is not an optimistic scenario. Therefore it will be ignored, or denied, or ridiculed, or... explained away with fantastic optimistic notions of ever improving innovative technological solutions -- that haven't been invented yet... and are often simply impossible because they violate the laws of physics and/or geological/ecological limits.
But human business or human activity of any sort, if it is to be successful, also demands, actually requires, a solid footing in reality. Determining what is real is often daunting, especially when that reality isn't what we expect or want to see. That is basic human nature. We are happiest when living in a population that experiences an abundant environment, a cornucopia of food and resources.
Yet we are overpopulating, and depleting non-renewable resources to the point of scarcity and expense and contraction of the economy - making ourselves miserable. We need cultural acceptance of a population slim down plan, preferably via birth control, to the point where we can live in an abundant, sustainable way -- on renewable energy and resources. Yes that means big changes... for the better.
So we can be optimistic, we just have to look to the far horizon and understand what it will take to continue human life and all life on Earth deep into the future:
Balancing our demands with the limits to what the Earth and Sun can actually provide to us, virtually forever.
This was originally written as a comment to the article:
Here's What Peak Oil Prophets Are Failing To Consider
There are several very good comments there answering this absurd article of faith.