You say that agriculture, writing and democracy have changed human nature but I argue they have only changed the backdrop against which the play takes place, the players and the lines are the same as ever. People didn’t think any differently when they were hunter gatherers, illiterate and living in a family group instead of a city. The subject matter would differ but the nature of the thoughts would be the same as if you were thinking about the same things.
That I agree with to an extent. I don't have thoughts that a witch cursed me, for example, or that I can accuse people based on a revelation rather than objective evidence.
> Our wider scale dealings and political intrigues are largely the same
Unless I misunderstand your meaning, that claim is clearly untrue. There was no democracy, rule of law, freedom, etc. etc. etc. for most of human history. We handled political issues much differently; intrigues don't involve murder and civil war.
That's a popular claim - just like the claims against journalism - but also historically ignorant. Human biology hasn't changed in ~200K years, but human nature has changed dramatically. It took 190K years to discover agriculture and 195K years to discover writing, and look what happened since then! Look at our natures compared with humans 200, 500, 1K, 10K, 100K years ago: We're democratic, free, incredibly prosperous and safe and peaceful, etc. etc.