Soul's question:
<< If you had power to stop a event which would cause billions of deaths but lead to a better reality over time what would you do? >>
appeared to be probing whether this forum leans toward deontological or teleological ethics. Deontological ethics places moral value in doing duty, the source of which is reason. It is said to be morally intuitive (keep in mind that "morality" is about what is "right" and is thus subjective), and regards each action's immediate effects upon others, without considering the infinite probabilities of effects that might result from each action. Laura's answer reflected this viewpoint almost exactly. Basically, deontological ethics postulates that the end doesn't justify the means.
Teleological ethics are the opposite -- evaluates actions based on end result -- places moral value in a desirable end, which is supposed to be some "good," the means to which are justified. And these means can include morally counter-intuitive actions (such as killing people). A choice for (as in Soul's question) "better reality over time" at the cost of "billions of deaths" would be teleologically ethical. Consequentialism is one form of teleological ethics that states that to reach a desirable end, there is moral value in the course of actions required. Utilitarianism is another form in which the "desirable end" is the "greatest good" for the greatest number of people.
The trouble with teleological/consequentialist/utilitarianist viewpoints is, quite obviously, that each "desirable end" and "good" is determined by an individual or group, which leaves things wide open to subjectivity, relativism, and rationalization. Imagine the playground that this is for the pathological person in a position of power. Consequentialism and Utilitarianism are the ethics of world leaders, who believe they are doing the world a favor by striving for "desirable ends" such as "democracy," "peace," or "wealth," no matter how many people they have to kill, imprison, or otherwise make miserable to succeed in their goals.
If I read it right, I think Soul didn't like Laura's answer and was fishing for someone to contradict it. He pushed the "greater good" argument by asking, "what if the event is part of the realitys natural progress?" Embedded in Soul's question, though, is the suggestion that reality is something other than us and that we have no say in reality's progress. This would deny the idea (among others) that all reality is consciousness. Anyway -- sounded like he was looking forward to an apocalypse and didn't want anyone interfering with progress towards it -- though I could be wrong.
Authoritarian governments simply decide on what's good and decide on the means to achieve it. A democratic government is supposed to run on contractual ethics, so that the populace supports each contract. A "desirable end" is agreed upon, then the means (course of actions) to it are supposed to be decided upon based on reasoned argument, weighing the side effects, agreeing to accept them, etc. However, every stage of the process is an open door to manipulative and deceitful behavior. How is agreement reached? Who gets to vote? Did a majority even vote? Who counts the votes? Who determined the side effects? How were they determined? How were they presented? Was everyone informed of them without bias? Is there a provision for stopping the means if they go off course? Is there a provision for stopping the means if the effects aren't what was expected? Etc., etc.