The Aliens also waited so long for invasion because they need BLOOD. The human population was at its highest, its like what.. over 6 billion people in the world today or some bogus number like that?
Haven't read any further, but here's an interesting fact. There are more people alive today than people that have died over all of history. In other words, if every person in the world decided to pull a Hamlet, there wouldn't be enough skulls in the world for every one. Kinda freaky when you think of it...
Carry on.
I saw the movie, pretty good, nothing amazing. I'm not a fan of Tom Cruise, but the thing that made the move for me were the human dynamics. It's true though, the part with the ferry. Masses of people are dangerous...
If a building is on fire, and you go to the inhabitants one by one, they'll walk out calmly. Tell a whole crowd at once, and they'll stamped and try to kill each other to escape.