The invention of the printing press

Johannes Gutenberg is usually cited as the inventor of the printing press. Indeed, the German goldsmith's 15th-century contribution to the technology was revolutionary — enabling the mass production of books and the rapid dissemination of knowledge throughout Europe.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

people can see all information on a topic and believe it because of technology