Yes.
Belief in God
A Strong Moral Code
Protection of the Family
In order.
- No, there is no reason that 'God' proper is needed. I assume you are implying the Judeo/Christian 'God', as you capitilized the word god. This is false, for many reasons.
:'Gods' as in polytheism were the dominant form prior to Christianity. Indeed there are still some regions where polytheism rules, I would actually argue that Christianity is not a monotheistic religion but is actually polytheistic, but that is another discussion. Knowing personally several Chinese people I have been made aware that a large nation and people may flourish with no concept of 'God' or 'gods'. Thus convincing me that no 'god' is needed. It is my belief that 'gods' or 'God' is a tool of the powerful to keep the many in check. It is also a theory of mine that most religions were set up on teh basis of Hammurabis laws. It just so happens that these laws are easier to enforce if an all powerful 'god' has given them to you.
- Yes. A strong moral code is important. I do not believe that mankind is as loyal to his fellows as say ... a noble animal such as the wolf. Therefore a strong moral code in order to ensure a stable society is needed. Furthermore an enforcement policy and agency is also required, otherwise there is no reason to follow the code.
- Protection of Family? This seems a tad vague. What is your definition of family? If you mean your immediate family, or pack, then no. This is not needed for a stable civilization. It is required however for a stable family unit. One must wonder though, what are you protecting your family from? Animals? This is not too difficult once the pack gets large enough, especially when several packs come together and form a clan. Once a city is formed or even a nation state animals pose lilttle threat to man in general, though naturally on an individual basis the wolf is no less dangerous to the human.
Here are what I think are the needed things for a stable civilization ... but wait ... are we speaking of nation states? Cultures? What?
So I will assume nation state.
- Food. Without this there is nothing. One must secure proper food sources to sustain a large population, otherwise man will revert to his nomadic form or perhaps worse ... cannablism.
- Security. I suppose this is somewhat like your protection of the family, but encompasses a much larger scope. This includes not only the policing of your own but the establishment of a warrior caste or military to protect against outsiders who perhaps want what you have.
- Occupation. Just as any military commander will tell you, idol people are dangerous people. Why do you think soldiers dig so much? Why do you think Roman commanders had their men build so many roads and walls? To keep them busy and keep them from sitting around grumbling and complaining. Busy minds do not have time to think and busy hands do not have time to fight, therefore busy people do not have time to revolt.
Without the three above things it is my opinion that a nation or city cannot exist.
The story ends, it just ends.