How do clones affect society?

Its is hard to tell. Cloning animals could help to mass produce the best type - ie cloning a cow that holds the world record for milk production, so that benefits can be reaped by other farmers. Pet cloning is an industry that is already starting to take off, and although the clone will look almost exactly the same as its twin, because of environmental factors it will probably have a completely differentpersonality. Human clones are by far the most controversial Currently it is illegal, under international law, to clone a human, although it is possible to imagine a future with cloned humans. Human clones would be very similar to twins, and although it is possible to think of a few advantages of human clones (better worker productivity, more immunity to diseases) the consequences of things going massively wrong (the creation of a 'super race' which might consider itself above other humans, which could lead to mass genocide etc) are so great, that, at this moment in time, it is probably better not to risk it.