Your brain, usually.
how did his inventions change the world
Ideas for inventions can come from your imagination. Invention ideas sometimes come from a person thinking of a new use for something or a better way of doing something.
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Rebirth of new ideas, and inventions
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Revolution of ideas and arts inside countries or an area. It can promote more ideas and art. The Renaissance (a movement around the 14th-17th centuries) promoted new ideas in concepts like religion, and different styles of art, along with new inventions. Inventions can change a whole era for the good, or better (like Nobel, the man who created dynamite, saw all the destruction he caused and created the Nobel peace prize)
A person with new ideas and inventions can be referred to as an inventor, entrepreneur, or innovator. Phrases referring to such a person could be creative thinker or creative designer.
Political power
The spread of ideas, inventions, or patterns of behavior is called diffusion. This refers to the process by which these elements are transmitted from one group or society to another.
A frisbee and hool-a-hoop put together.
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