Ok, a harder one (ds):
1. Historian and writer who wrote of his own time in his "Annals."

2. Was well read by many of America's founding fathers as a classical reference.

3. He despised concentration of power in the hands of one.

Plato?

John Locke.

no and no guys, good shots though.

The Roman Historian,Publius Cornelius Tacitus.

Good show Viv, you got it. Should've known a literary master would have.