Technology
Land Title
The fourth tier of the iskan branch; its prerequisite is Mining. In the other branches this tier is the doctrine; since iskan has no doctrine, tapu neither requires nor binds your doctrine choice (Research and the tech tree).
It unlocks nothing, it grants a passive
tapu unlocks no building or unit; it carries the passive shown in the Effects row of the table above, which takes effect the moment you know it: it raises the population cap of all your cities by a step (Cities and population). Capped cities grow again and the food waiting in the granary flows to them.
Healing and Cavalry grant the same step; steps add up, so a player who knows all three has a cap three steps higher.
When to research it
When your cities are pressed against their cap and food is piling up in the granary. If your doctrine lies outside muhafaza and harp, this is the only doctrine-independent way to reach a cap step. The branch's last tier, Prosperity, lists this node as a prerequisite.
The numbers on this page are read from the game’s balance tables.