The World Academy of Art and Science was founded in the sixties by the leading scientists of the day so that it could pronounce on mattes of vital importance to the world. Among its 500 Fellows there are about 90 Nobel Laureates. Generally, their Congress is conducted once in five years on themes relevant to the world society. Their next Congress is coming in Zagreb, Croatia in 2005. Its central theme is Knowledge Society. As part of it, they are considering several themes. Rationality is one of those themes.