For decades, mankind has been fascinated by the idea of extraterrestrials. Such fascination spilled over to Hollywood as soon as the industry was birthed, and the spatter has remained ever since. Thankfully, there are many ways sci-fi writers can go with alien stories. In some movies, alien creatures seek to colonize Earth, others simply want to steal resources, others still have nothing but genocide on their minds, and then there are those who dont care about Earth at all. Its humans who invade their territory and cause them to fight back. Occasionally, some are even shown to be friendly.