Why no alien visit Earth?
With the renewed conflicts on Earth, it is evidence why no higher intelligence being ever wanted to visit this planet! WHO would want to see the incumbents killing each other again and again for no apparent reason! Alien would think that all being on this planet is stupid or what? These people would spent so much time and resources on building weapons to annihilate each other again and again for thousands of years until maybe 1 day an all out nuclear war would reduce this planet to shambles! Ya maybe this is the unique destiny of this little planet!