[ecocentrik]

There's not that many controversial topics at any given time. One of Wikipedia's solutions was to lock pages until a controversy subsided. Perma-controversy has been managed in other ways, like avoiding the statement of opinion as fact, the use of clear and uncontroversial language, using discussion pages to hash out acceptable and unacceptable content, competent moderators... Rage burns itself and people get bored with vandalism.

[underlipton]

It doesn't always work. There are many topics that are perpetual edit wars because both (multiple) sides see the proliferation of their perspective as a matter of life and death. In many cases, one side is correct in this assessment and the others are delusional, but it's not always easy to align the side that's correct with the people who effectively control the page, because editors indeed do have their own biases (whether because of ideology, a philosophy, a political party, a nation, or whatever else). For those topics, Wikipedia can never be a source of "truth".