Dwight D. Eisenhower

When we acquired California and New- Mexico this party, scorning all compromises and all concessions, demanded that slavery should be forever excluded from them, and all other acquisitions of the Republic, either by purchase or conquest, forever.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.