The stable functioning of a society depends upon the relatively long-term stability of the goals of its citizens.
Conclusion
The stable functioning of a society depends upon the relatively long-term stability of the goals of its citizens.
Evidence (This is clear from the fact that)
If a most individuals don't have a predictable or enduring set of aspirations, it will be impossible for a legislature to craft laws that augment their satisfaction, and it should be obvious that a society is stable only if its laws tend to increase the happiness of its citizens.
Evaluate
This paragraph is made to be very hard to read. Whenever we do Role and Main Conclusion, though, we know that there's an 80% or better chance that we'll hear the Conclusion before we hear its Supporting idea(s).
So we always read the paragraph on Role and Main Conclusion with a special ear for conclusions in the first sentence. This first sentence doesn't sound like an opinion, so we wouldn't initially know it was the conclusion.
But then the second sentence tells us it was the conclusion, by indicating that now we are trying to support that claim.
This suspect is guilty. This is clear from the fact that he had a motive and that his fingerprints are on the murder weapon.
The verdict is clear from the facts of the evidence. The conclusion is clear from the facts of the evidence.
The other keyword that's useful here is 'and', which almost always joins two Premises.
So using keywords and knowing the usual tendency of Role and Main Conclusion to put the Conclusion earlier than the Supporting idea(s) are both very useful when it comes to sorting out this paragraph.
In terms of making it more conversational, the first sentence is saying,
After all, a government won't be able to write policy in ways that help citizens if most citizens are frequently shifting in terms of what goals they aspire to. And if If a society's laws are helping citizens, then obviously society won't be stable.
Goal
They're asking us about the third claim, which is one of the two Premises.
So we'll look for stuff like premise evidence partial support (because there's more than one premise)