Speech

When did our ancestors begin speaking?  Myself, I always think in words.  Thinking about how to fix this device, or where is the game lurking or how to exert leadership of a hunting band, or how to chip flint, or how do I fell this tree without dropping on top of my dwelling or how do I get across that river short of swimming it, all these things I think of in words.  Raw emotion, love, fear, hatred, awe, does not need words, but thoughts such as “why is this engine running rough” or “How do a fix this bug” I always do in words.  I assume most other people do too. 

    Thinking is our magic wand.  Looking at the fossil record we see brain size increasing as time goes on.  This was a successful evolutionary strategy that has made homo sapiens master of the planet.  Would increasing brain size do us any good without words to put our thoughts into?  I always think in words.  If I didn’t have words, I could not think.  Does this mean that our earliest ancestors could speak too?  Without speech would our larger brains do us any good? 

This is all pure speculation of course.  I am not aware of any evidence one way or the other.  And I cannot imagine finding speech in the fossil record.