Here's why:
* Language Development: While early humans likely had some form of communication, it was much simpler than the complex language systems we use now. The development of language was a gradual process that took thousands of years.
* Written Language: Writing is an even more recent invention, emerging around 5,000 years ago in Mesopotamia. Before that, humans relied on oral traditions and symbols to record information.
* Evolution of Speech: The physical structures necessary for advanced speech, like the larynx and the vocal tract, evolved over time. Early humans would have had different vocalizations and communication methods.
Key Points:
* Early humans did have communication, likely through gestures, sounds, and possibly early forms of spoken language.
* The ability to speak and write in the way we do today developed over a very long period of time.
* While we can't definitively say what early humans could communicate, we know that their abilities were significantly different from modern humans.