Pigeons with a 95% success rate.
The development of printing initiated revolutionary changes that would change all of Europe. Such changes included an era of mass production of books. Then, as the availability and number of books increased, more people learned to read and write.
As reading and writing became more common, many more Christians could already read the Bible. As a result, the ideas of religious reformers spread faster and to a larger audience than ever was, and the movement known as the Protestant Reformation would unleash forces that would shatter Christian unity in Europe.
Millions of people moved during the Industrial Revolution. Some simply moved from a village to a town in the hope of finding work whilst others moved from one country to another in search of a better way of life. Some had no choice, transportation was a punishment for some crimes.
It lies in the fact that the senior party to any relationship provided land and oversight to the junior party’s who in turn was expected to provide his lord with economic and military support.