I think many of the nay sayers are looking too narrowly at stephen's idea.
First in conjunction to the basic idea that aliens would want the resources of earth someone made the point of the same precious metals being in our asteroid belt. If beings with the capacity of such great traveling distance needed resources they would take more than just what earth had to offer they would essentially take over our solar system, wiping us out simply because we are the only intelligent life here, that we know of anyway.
Since hawking's ideas, biology and physics have grouped potential intelligent life into i believe its 3 classes. class 1 controls the complete power of the planet, meaning they master their immediate resources. 2 controls a star meaning they have used up their planetary resources or realized it was more beneficial to skip those resources and go for completely harnessing a sun. And the third class harnesses the power of multiple stars.
More than likely if hostile aliens come here they will be of type 3 class due to thier ability to travel across multiple galaxies and would be looking to consume not only this planet but the galaxy.
and to simply also try and make the argument that it would cost them more resources to invade our galaxy than to leave us alone. first this group is clearly nomadic meaning they either move or they die. secondly you are basing thier technology and resources on our technological frame of reference and the technology we have currently is just rediculously wasteful, more intelligent life as someone else said would be using resources and techniques unfathomable to our minds right now.
The truth just is that there is absolutely no reason why an advanced civilization would come to earth without the intent of harming us. We cant contribute to thier civilization other than resources we truely have little or no control over and we would not be smart enough to defend ourselves either.
First in conjunction to the basic idea that aliens would want the resources of earth someone made the point of the same precious metals being in our asteroid belt. If beings with the capacity of such great traveling distance needed resources they would take more than just what earth had to offer they would essentially take over our solar system, wiping us out simply because we are the only intelligent life here, that we know of anyway.
Since hawking's ideas, biology and physics have grouped potential intelligent life into i believe its 3 classes. class 1 controls the complete power of the planet, meaning they master their immediate resources. 2 controls a star meaning they have used up their planetary resources or realized it was more beneficial to skip those resources and go for completely harnessing a sun. And the third class harnesses the power of multiple stars.
More than likely if hostile aliens come here they will be of type 3 class due to thier ability to travel across multiple galaxies and would be looking to consume not only this planet but the galaxy.
and to simply also try and make the argument that it would cost them more resources to invade our galaxy than to leave us alone. first this group is clearly nomadic meaning they either move or they die. secondly you are basing thier technology and resources on our technological frame of reference and the technology we have currently is just rediculously wasteful, more intelligent life as someone else said would be using resources and techniques unfathomable to our minds right now.
The truth just is that there is absolutely no reason why an advanced civilization would come to earth without the intent of harming us. We cant contribute to thier civilization other than resources we truely have little or no control over and we would not be smart enough to defend ourselves either.