Probably better answered as a non-black-and-white question.
Simply reviewing the events of the last 120 years (fin de siecle), hundreds of millions of mostly-good humans suffered death by their own government (Germany, Russia, present People's Republic of China, Cambodia, Rwanda, Yugoslavia), as well as horrendous sufferings in warfare, famine, pestilence, etc., etc.
Millions of preborn humans' opportunities for life were denied by their own mothers.
Great financial burdens (plutocratic and socialistic) imposed on the many by the few.
Yet, in the past three decades (1990-present), extreme poverty (people living on <$2/day, U.S. 2011 dollars) has gone from 50% in South Asia to <20%; in East Asia and Pacific, from >60% to <5% (truly wonderful, ~ = to Europe and Central Asia rate of <4%), and the World as a whole from ~36% to ~12%.
Types of WMD have proliferated from pre-WWI days to the present.
A new techno-based tyranny, that of cyber surveillance of the masses, is a reality in China and elsewhere.
So, it's a mixed bag, and the tendency even in the 20th century has been something like this: as wealth increases for the many, elites develop to control both the wealth and the culture of the many. In times of crisis, as The Mikel and AlParker60 and others observe, there are types of shifts or chaotic, destructive conditions.
Imho, the tragedy is that the many sheeple are without much awareness of God, and without sufficient strength of character.