Science, as illustrated by the printing press, the telegraph, the railway, is a double-edged sword. At the same moment that it puts an enormous power in the hands of the good man, it also offers an equal advantage to the evil disposed.
No tyrant, however evil, has yet lacked ready hands to execute his most abominable will. To read how eagerly men have rushed to serve the despot is the bitterest, the saddest matter of history; it is the saddest sight in our own day.