Sci-Fi and war were seemingly made to go hand in hand.
After all, isn't it human nature to fear the unknown? And what could be more unknown that whatever awaits us in the depths of space?
It follows logically that, if the human race was to encounter extra-terrestrial life forms, we would quickly resort to trying to kill them, because we have ultimately spent the last few thousand years doing the same to one another.
There's something about seeing it happen on other planets that is irresistible to audiences, and the implications of the genre are at once terrifying and unbelievably exciting.
But which of all the movies that tread that particular ground are the best? There are so many examples out there of humankind attempting to plant their flag elsewhere, or repelling alien races seeking to do the same on our beloved Earth, that it's sometimes easy to lose yourself in the minefield of Sci-Fi titles.
Some are poorly written, acted or executed, especially where visual effects come into play. But there are some true gems among them, and the following is a list of 10 of the best.
Children of the 1980s may remember Hasbro's initial license to print money, the TV show that was little more than an advert for toy robots, Transformers.
Michael Bay prompted groans everywhere when it was announced that he would be taking the helm of a big Hollywood Transformers reboot, but when it came out in 2007, fans were pleasantly surprised with how good it was.
The Transformers story is one that Sci-Fi fans of all ages can enjoy: giant robots from a distant planet using Earth as the backdrop for their ongoing war. The scale of the Transformers, and the world they inhabit, is particularly huge, and it seems like one of those rare occasions when Michael Bay really is the only man for the job.
Given Bay's action movie pedigree, Transformers has some impressive set pieces, and it makes for a great watch.
There's also a whole slew of sequels which expand on the universe, giving us even more opportunities to see Optimus Prime and co. in action.