Assuming that this mortal life is an experience for learning what we need for eternity; there comes a point at which The System (which nowadays is a totalitarian global bureaucracy, mostly administered by docile servants and possessed slaves of demons) become net evil and must be allowed to destroy itself.
Creation is Good, and conversely evil is anti-creation. It is the Good within and around The System that enables it to accomplish anything, and when this Good is withdrawn The System will collapse.
Consider your own experience of working in your local branch of The System, within any branch of the single global bureaucracy = any institution, organisation or corporation of more than moderate size and power...
You will recognise that such groups function nowadays Only by those people who perform their function despite the institutional incentives. Those individuals who do exactly what they are 'supposed to do', function as almost-pure 'managerial' parasites; and an organisation that best fulfils its bureaucratic function is almost-wholly a-functional and actually-parasitic.
It is the Good people and those who (some of the time) do Good things, against the spirit and letter of what they are 'supposed to' do, who maintain the world in face of the mass of evil people and the evil that all Men do much of the time...
All that is necessary is for the Good people to stop doing Good, and everything will collapse; and since The System is ever-more orientated towards the prevention of Good and enforcement of evil - this point will inevitably arise so long as The System survives. As The System develops, the Good will simply become unable to do Good.
So, either The System will collapse soon because it implicitly seeks its own collapse; or else The System will collapse later, when it has sufficiently suppressed the remaining Good.
Thus evil is self-limiting, by its nature. Obviously.
Of course, the collapse of The System will not - of itself - do any Good at all; but would only do Good if the experiences led to spiritual learning.
The collapse of The System would lead to the deaths of billions of people, but of itself that is a neutral fact - since everybody will die sooner or later. The question is what happens to these people after they die; and that is mostly a matter of what these people want... Their inner motivations, their spiritual (or otherwise) aspirations - whether they are motivated by (real, objective) Love or by (subjective, evanescent) pleasure...
Nothing (I believe) is more important than a person's basic assumptions concerning the nature of reality, of Life, of his place in the scheme of things and what he ultimately wants. Is this world one with prupose and of meaning? Is there a niche for each individual within purpose and meaning? What is the role of freedom, and what its possible aim?
It would potentially be of incalculable value if such matters could become the subject of thinking.