I am not sure whether we can call Ancient Athens or Early Modern Italy "high trust". Both were pretty warlike, though - another source of innovations.
The fact that wars tend to result in extremely quick innovation cycles (both out of fear of losing and from usual bureaucracy being shoved away) is quite nasty ethically, but cannot be wished away.
Neither Ukraine nor Russia are high-trust societies, but they have done more drone development in four years than the entire world together in forty.
> I am not sure whether we can call Ancient Athens or Early Modern Italy "high trust". Both were pretty warlike, though - another source of innovations.
The class that brought most of the innovations, citizens of Rome or Athens, a privileged ruling class, had a strong in-group honor system. The rest of the society was not so, but they were so divided that those other parts didn't even count.