Who was the first person to send messages through wireless radio waves over long distances?

Guglielmo Marconi is widely recognized as the first person to successfully send messages through wireless radio waves over long distances. His pioneering work in the late 19th century led to the development of the first effective system for long-range communication using radio. By establishing the first transatlantic radio transmission in 1901, Marconi's innovations demonstrated the potential of wireless technology and laid the foundation for modern radio communication.

His experiments and subsequent commercial applications of wireless telegraphy significantly advanced the field of communication, allowing messages to be sent without the need for physical connections such as wires. This achievement marked a crucial turning point in the history of communication technology, leading to the widespread adoption of radio for various purposes, including broadcasting and maritime communication.

The other individuals mentioned made important contributions to technology and communication but were not the first to send messages via wireless radio waves over long distances. For instance, David Sarnoff is known for his role in the development of broadcasting and television, Nikola Tesla contributed foundational ideas related to wireless energy transmission, and Lee DeForest invented the audion, a vacuum tube that improved radio communication, but none were the first to achieve long-distance wireless messaging like Marconi.