My mother was watching the end of contact today and I said if I had to do a movie comparison for if the Earth was invaded/first contact it would be Signs, Independence Day, and the Arrival (actually I was more thinking of Contact then I realized it wasn't like the other two) Invader Zim being an alien invading earth sort of thing got me questioning why people liked thatkind of theme. I think the answer is that we like the idea of everyone uniting for a greater good eg; destroying a common enemy. Its sort of a quick fix to world peace. Maybe I am wrong and that the only reason people like alien invasion theme is that its so cliche. Still at the end of the day I would really like to see the unity portrayed in thoes movies except without all the destruction.