Gallente-Minmatar relations were brought up a while ago, but in this round would like to focus more on the states of the Federation and Republic and their position on the cluster map, ensuring their survival and/or dominance. The socio-cultural relations vary greatly, with Federal Minmatar having split views on whether tribalism or democracy is the way forward, disagreements between "high culture" Gallenteans and "low culture" Minmatar, a strong bond between the FedNav and RepFleet (Exercise Brotherhood) etc. This is more in the idea of realpolitik, ignoring these aspects and focusing on pure pragmatism.
- The Federation and Republic occupy the west, east and central areas of the cluster, and share adjacent borders, allowing easy trade and immigration. They cut off the Caldari State and Amarr Empire (as well as the Khanid Kingdom), meaning that those two nations have to cut deals/treaties with the Minmatar/Gallente to permit transit through. Position of Republic and Federation is thus key to keeping the Amarr-Caldari bloc at bay. Danger of "two front war"
- From a Gallente perspective, the long-term threat of the Amarr Empire (not Caldari State), the other "world conquering" power alongside the Fed. Rival in achieving ultimate domination of the cluster (not through cultural means, military? Religious proliferation?) Importance of having Minmatar as ally against hated mutual enemy
- From Minmatar perspective, 1/5 of people are Federation citizens or expatriates. Cannot abandon, unable to break tie with Federation for this reason. Large portion of Federation military units of Minmatar origin (may have changed with Caldari Prime invasion?), intrinsic relation between Gallente and Minmatar militaries.
- Mutual desire to hinder/destroy Amarr Empire, utilize shared cultural values of anti-slavery, freedom and liberty. Joint support of freedom fighters. FIO operators incite slave rebellions on remote Amarr planets?
- From Gallente perspective, training the Minmatar military from tribal warriors to professional military as “buffer” against Amarr Empire to focus on short-term threat of Caldari State.
- Recognition of unrelenting Minmatar and Amarr causes. Caldari State ultimately reconcilable through trade, complex economic interests, market economy ideologies etc. Past desires to abandon war and cooperate “for the benefit of mankind” (Crielire). Amarr will never rest until galaxy conquered, Minmatar will never rest until Amarr destroyed. Amarr primary rival to establishing hegemony, thus Minmatar ally is preferable.
Things like this, at any rate. I didn't really cover the threats of the "rogue states" (ie. pirates), as all four are united under CONCORD when dealing with them.