Its related to some some Adventure tech for Kingdoms and Domination tech for Empire. I can't tell you more without referencing this thread as I need to tab out ingame to check it out anyways because the descriptions are ridiculous. I recommend bookmarking it until someone gets around to typing up a better description.

https://forums.elementalgame.com/393211

Thanks for the link.. i never did figure out which techs actually raise it in all the time i've put into this game. Something that should be mentioned in the text of the particular techs IMHO.

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Please this, people keep mentioning it again over and over DEREK please please please fix this it should take 15 - 20 minutes and save a lot of stress.