If someone with a basic High School education traveled back to Anitquity (i.e. Ancient Egypt or Greece) and became advisor to the King, how much would they be able to help advance civilization?

Sorry, but your submission has been removed because we don't allow hypothetical questions. If possible, please feel free to rephrase the question so that it does not call for such speculation, and resubmit Otherwise, this sort of thing is better suited for /r/HistoryWhatIf.