The Middle East spread their ideas by warfare and conquests
The middle east spread their ideas by warfare and conquests
In ancient Greece ideas were mainly spread verbally. People talked about them.
People who spread religious ideas are called missionaries.
The spread of people,ideas,technology and products among plaves
trade
New ideas spread by people printing and sailing to undiscovered places.
When a people are conquered, but not wiped out, their ideas may spread to the conquerors -- actually, ideas can spread either way. When people trade with each other, ideas may spread. Anytime there is communication, ideas may spread. Building a large wall and keeping anyone from cross it -- that is not a good way for ideas to spread.
Of course ancient Rome's political ideas spread. They carried their politics with them all over the empire. After the dissolution of the Roman empiretheir legal concepts remained and today form the basis of many western laws.
People talk in memes to spread cultural ideas from one person to another.
spread it globably to different people
By people meeting each other and giving ideas