Every single tribe in history has come up with its own answers to the great questions, and there are as many answers as there are variables affecting the life of a tribe. I believe we should therefore base the answers to the questions to our tribesmen and their lives. Just like in Tropico, the player needs to win election, sway the voters, and perhaps control the people, or how in Crusader Kings the player must insure the loyalty of the most important vassals, and rely on their approval for legislative reforms, so should we in Ancient Cities be reliant on the people for both approval and many initiatives. Events! 
A happy tribe will work better, achieve more, make discoveries, but perhaps also become complacent. It will attract other tribes, both as migrants and aggressors. Need, or necessity, is the mother of inventions, but also of action. If there is a lack of food, your tribesmen should bring this matter up, and, if needs be, act against their leader, the player. If there is plenty of most things, but the oldest son of a certain household wants to build a house for himself, so that he may marry a girl, the player should be notified of this wish. In the end, the young tribesman might be so fed up with it all, that he will strike out on his own.
Justice and right should also evolve depending on the culture of our tribe. If a crime is committed, and the tribe is outraged, then they will probably bring that up, prompting the player to either agree to the suggestions/demands, or answer with something else. Imagine a button opening up a menu of basic laws. At the start of the game, it would be greyed out, but as your tribe develops, population increases, and problems arise that were unimaginable from the start, more and more events occur, like the first theft, the first murder, the first adultery and so forth, prompting more decisions, filling the menu with colour. But of course, this is a thought more appropriate in threads dealing with crime, justice and police issues:
I would opt for the same approach in technology, though I believe that’s more fleshed out as it were. Organic, logical growth over time, depending on many variables, leading to knowledge appearing for individuals, and then, depending again on different variables, spreading to other individual tribesmen. This thread: