Culture Empire Core Strength (manual)

Culture is one of your empire's radiant powers. It decays most quickly over distance but also has the greatest potential effect. When your empire's at-distance culture is greater than that of a system, you will include that system in your empire. This has an impact on your trade, your land, and your wealth.

The formula for culture is still in flux but, at the time of this writing, it was $$ {\sqrt[{31 \over 12}]{J \times I \times \sqrt[4]{W} \times \sqrt[3]{A}}} $$.