No? The sword isn't mightier than the pen?
While one man's sword may kill hundreds, even thousands, the writings that come from a single pen may influence human history for aeons to come.
According to the proverb "The pen is mightier than the sword", yes. Ideas written by writers have more effect on history in the long run than battles do.
A pen may sign a treaty. A blade draws blood.
Yes, because written words can alter the emotion of a person while a blade can't.