By 900 A.D., the Mayan culture began to decline. It is not entirely clear as to why, however, many historians believe that war broke out between different members of royal families. This civil war made farming difficult, and as a result, many people died from hunger and disease. By the late 900s A.D., almost all signs of this once great civilization were gone.
We grow neither better nor worse as we grow old, but more like ourselves.
May Lamberton Becker
The first encyclopedia was written by Saint Isidore in the 17th century.