Art

Do we have good art and bad art? or any kind of art is appreciable? today we face to some kinds of products that are different in many aspect from the art that we have known since last century. 
is there any relationship between art and morality? is there any specific aim for art? what if art defuse immorality between nations? 
some believe art is for elevating understanding, which may distinguish human from other species. and a few believe not only art can elevate understanding it can exult individuals' souls. when you look at art belongs to 19th century you may find some signs of so-called art, but nowadays you can rarely can find such art. however, the glimmerings of new generation of art can be felt.