Can architecture structures be damaged by other players at any time?

Will architects get towers that can be placed without having to build or terraform dirt towers.

Can you explain how the market system will work, as in how will we be doing trades?

Will we get towers that architectures can build rather than having to build dirt towers?

I know you said you don't plan to implement carts, however is there some other way you plan for us to do large quantity trading over large distances?

Will global chat be in at the game at prelude/launch? It doesn't bother me, however I know there are a niche of people that will feel like it's game breaking.