The invention that significantly helped spread the ideas of the Renaissance was the printing press, developed by Johannes Gutenberg in the mid-15th century.
The printing press allowed for the mass production of books and written materials, which made literature, scientific texts, and philosophical works more accessible to a broader audience. Prior to this innovation, books were laboriously copied by hand, making them expensive and rare. With the printing press, it became possible to produce large quantities of printed materials quickly and relatively inexpensively.
This ease of access to knowledge played a crucial role in the dissemination of Renaissance ideas, such as humanism, art, science, and literature, across Europe. The increased availability of printed books not only educated the populace but also facilitated discussions and debates about new ideas, significantly contributing to the cultural movement of the Renaissance.