Answer:
I believe the printing press. Before the printing press books were very rare and expensive. Most religious scrolls were put on cloth or papyrus(a type of plant). After the invention of the printing press it made books less rare and expensive. And launched the world into a more modern era.
It would be the reversing the trends toward socialism and secularism
Its right......im really sure of it
That machine gun was first let out in the mid 1900’s and it changed the way of fighting from the one shot reloaders that they had before this invention. This gun changed the nature fighting by allowing more rounds to be produced at the enemies causing more to be dead. This gun helped kill off more people and helped gain more accuracy in the creation of guns til this day.
I hope this helps!