so, the wikipedia articles you shared show that pax romana and pax mongolica fostered trade. is increased trade worth genocide and mass slavery? I would lean to no but actually, you're comparing apples and oranges. why are you doing that?

nice job slipping "social progress" into your argument. I wonder what your sources actually say?

Romans regarded peace not as an absence of war, but as a rare situation which existed when all opponents had been beaten down and lost the ability to resist

yay social progress!