I don't think she says anything about democracy at all. It doesn't seem to have been common in pre-industrial times.
Brotherhood of Kings: How International Relations Shaped the Ancient Near East https://www.amazon.com/gp/product/0195313984/
The Box: How the Shipping Container Made the World Smaller and the Economy Bigger https://www.amazon.com/gp/product/0691136408/
The Mystery of the Hanging Garden of Babylon: An Elusive World Wonder Traced https://www.amazon.com/gp/product/B00CG3JMD0/
The Blank Slate: The Modern Denial of Human Nature https://www.amazon.com/dp/0670031518/
Interestingly, those positions have reversed in the modern day, with the analogue of serfdom -- W2 employment -- heavily favored by the state, and the analogue of freeholding -- employment as a contractor -- preferable to employers (who mostly lack the power to implement it over the state's objection).
History supports this view in some obvious ways -- European peasant revolutions included demands for standardized weights and measures as a counter to abuse of nonstandard measures by local lords.