Wow! Sorry for the crazy long title- couldn't come up with a good way to condense it.

What I would like to request is that there be an option to give any technology, spell, quest, or event an option to require a quest to be completed, a spell to be learned or cast, or an event to have fired.

This would allow for things like a "Magic Weapons" technology that requires you to learn a certain technology in the magic tree before it will appear. Another example would be an "Advanced Farming" technology that might require you first to discover the Pitchfork in a quest. Yet another example would be a quest that becomes available after a specific spell is cast.

The whole idea is that if any of these things can require another you have a lot more flexibility as a modder, and if this was used in the core game it could make the game deeper, without making it much more complicated. (Yeah I know it sounds complicated on paper - think about it... it really is a very simple concept, and likely would not be very difficult to implement)