I too was curious as to how the alien race that are the Transformers managed to evolve. Furthermore, why did they evolve into an easily distinguishable set of races based on morality. You realize this, no? There are two races of Transformer, AutoBots and Decepticons. They look, think, transform, and behave differently.

In attempting to work through the problem, Roger Ebert manages to insult Michael Bay, Transformers, and Intelligent Design theorists in one fell swoop:

I raise the subject of Creationism because it opens the door to Intelligent Design, which I will require to explain the existence of Autobots. Do you know what an Autobot looks like? At first appearance they’re mild-mannered motor vehicles. They are suddenly capable of unfolding and expanding into gigantic humanoid robots whose size seems optional, since sometimes they can bend over and look a human in the eye, and at other times they are hundreds of feet tall. One might wonder how they pack so much metallic mass into an area the size of a Camaro, and well one might.

They seem to consist mostly of auto parts: Fenders, bumpers, grills, hoods, trunks, windshields, and sometimes large tractor tires as shoulders. These parts expand as needed according to scale. They seem to be entirely made of metal, although in this movie an old Autobot has grown a beard, and when another opens its jaws we can clearly see a strand of saliva, which I assume is Pennzoil.

I will avoid the obvious question: How did the inhabitants of Cybertron learn of modern human automobile designs? Since they are capable of such quick morphing, they obviously evolved their auto disguises as a tactic to move unnoticed among humans, and travel around at will. I assume they need gasoline as lifeblood, which explains their interest in the Middle East earlier in the story. Their decision to attack Chicago seems inexplicable, until you take into consideration the generous tax credits offered by the Illinois Film Office.

A more difficult question is: How did intelligent beings evolve from base metals in a non-organic process? What Autobots look like on Cybertron we cannot know, but logic suggests they look like metal robots, however alien in form. How was the metal mined, refined, shaped and assembled? Here’s where Intelligent Design becomes indispensable.