Who invented the radio?

The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection. These developments allowed Guglielmo Marconi to turn radio waves into a wireless communication system.

The radio was invented by Guglielmo Marconi, which allowed the harnessing of radio waves into a wireless communication system.  This invention did not happen in a vacuum.  It was enabled by investigating radio waves and understanding how to detect and transmit them.