Without much simplification:
Any intentional community starts with a cast of strong characters and one (1) driving personality.
If there are two driving personalities, they will challenge each other until there is only one.
The rest of the cast of characters are drawn into the community by familial ties, romantic liaison, birth, and economic opportunity / distress.
In the expanding cast of drawn characters, many driving personalities will appear, and when challenged, the leader of the moment will immediately declare them "harmfull to community harmony" or "ick".
If the community agrees, and the "ick" is dispelled the community continues.
If the community agrees and the "ick" is not dispelled the community declines until cohesion is lost and the capable people leave because they're tired of supporting the "ick".
If the community sides with the new personality, the leader of the moment is;
1: ousted and the community continues.
2: ousted and the community finds he has retained title to the bulk of assets and really been a "benign dictator" the community fails and a new community coalesces around the exposed (no longer so benign) dictator.
3: Ousted and the core of capable people leave with him and the community collapses.
Most people leave intentional communities out of frustration and exhaustion and mental fatigue.
Religion, (of the Jim Jones variety), creates an "us vs them" mentality that overcomes all three, perhaps not indefinitely but for extended periods.
Religion thrives on persecution.
Even artificial self imposed persecution.
So far the best system for a community is:
Personal possession of involved assets.....keeps people from walking away lightly.
A community that declares sycophants "ick" and establishes firm boundaries, checks and balances, on the leader of the moment.
Frequent turnover of the leader of the moment.
A no work, no eat ethos that declares dead weight "ick".
A dignified escape hatch for the spare driving personalities.
The failure of most communities starts with few of the "driving personalities" or benign dictators, will abide the previous paragraphs restrictions.
Most communities are stillborn as leaders demand cult like adherence to there edicts, or they walk away and the "driving force of the community" is dissapated.