Other than war and romance movies, possibly the next most popular genre involves aliens visiting Earth. Almost all end with some type of epic battle from which the primitive earthlings emerge victorious over the advanced alien race. Primitive humans? Indubitably. Any beings who can master star travel have to be more advanced technologically than one whose most advanced exploration method is by remotely controlled, unpeopled vehicles. Advanced technology implies advanced cognitive abilities to harness and create technology that must be light-years ahead of human-designed machinery.