Looking Backward to Look Foward, Learning New Things by Reviewing Old—A Glimpse of Global Issues over the Past Century

The 20th century has come to an end in the twinkling of an eye. It is an extraordinary century which experienced vicissitudes and brilliance, cast traumas and miracles and left regrets and hopes. Human race is now marching with great passion and eagerness into a new millennium and a new century which is believed to be also full of changes and glorious events.History is a mirror. People can predict the future by reviewing the past. Of course it is impossible to go through all the events of the…