But Evolution with a big E is about order from disorder or simple to complex.
I'd say that in fact it was exactly the opposite way round. Evolution with a small e is used to talk about things like stellar evolution or the evolution of gases. I'd also point out that the evolution of gases is going from a more to a less ordered state as this is commonly understood, i.e. a liquid or solid to a gas. That is because the word evolution predates Darwinian theory by many centuries. As it is used to describe the processes occurring in the lifes of stars or planets it is closer to its original usage, it has also been used to describe the development of embryos, all of these relate to its original meaning of an unrolling as of a scroll, i.e. the linear unfolding of a script.
Evolution with capitalisation is usually used for 'The theory of Evolution' which can encompass various elements of biological evolution connected to Darwin's theories about how populations of living organisms changed over time. Darwin himself was not a fan of the word evolution to describe the process, that usage being coined by Lyell.
If you want to argue about whether the evolution of gases is a fact I think you came to the wrong thread, and probably the wrong site.
TTFN,
WK