The Pax Economica was a period of peace after the National Dismantlement War and translates literally as "Economic Peace."
Described by Emil Gustav as totalitarian rule by the six ruling corporations, the Pax was a result of the corporations' lack of trust over its populace. Taking over a majority of the world's remaining resources (food, water, materials, energy), the corporations used this as leverage to force the population into working for them. This resulted in a surge of terrorist related attacks which the corporations put down with their Lynx pilots.
This period would soon end, however, with the beginning of the Lynx War.