Depends what you mean by "ideas".
In modern society, it's usually wireless communication such as internet.
Trade.
Alexander the Great bulit an empire to help spread greek ideas. Have fun.
Social media can help spread information and awareness about political revolutions.
Diderot's Encyclopedia compiled and disseminated a wide range of Enlightenment ideas on science, art, philosophy, and government in a single, accessible source. It helped spread these ideas by making them available to a broader audience, including scholars, students, and the general public. The Encyclopedia challenged traditional authority and promoted critical thinking, contributing to the growth of Enlightenment ideals across Europe.
Salons helped spread ideas of the Enlightenment, promoting intellectual discussion and cultural exchange among writers, philosophers, and artists. They played a crucial role in shaping attitudes and opinions on politics, philosophy, and society during the 18th century in Europe.
Philanthropy can be spread around the world by monetary giving of individuals to support a cause. Funding is of utmost importance in getting things done in all the different charities that are wanting to help the world.
Monks help spread Christianity across Europe.
Important ideas may begin in the midst of a big problem that needs sorted. These ideas then spread out with help from others who are willing to put the plan into action.
literature help us understand the world by allowing us to be open to new ideas
literature help us understand the world by allowing us to be open to new ideas
Merchants played a key role in spreading Renaissance ideas by facilitating trade and travel across regions, which allowed for the exchange of goods, knowledge, and cultural influences. Their interaction with diverse cultures helped to promote new ideas in art, science, and philosophy, contributing to the dissemination of Renaissance ideals of humanism, individualism, and creativity. Additionally, merchants often patronized artists and scholars, further supporting the development and diffusion of Renaissance thought.
Paper Money was first created by the Chinese around 600 AD. When the Mongols invaded, it was still there. So, Mongol traders spread it around the world while trading themselves. Hope it was a help!
The invention of the printing press made it less expensive and less time consuming to produce books. The availability of books allowed ideas to spread quickly.