The problem with "Left Behinders"

The problem with "Left Behinders" is that the emphasis is on hunkering down, getting spiritual and not being worldy in the sense of almost not participating in higher orders of society other than to make money and look for opportunities to evangelize on the sinking ship. Church is all and society is the mission-field that will eventually burn up - so why bother trying to effect long term change?
Post-millennialism [partial preterism] on the other hand encourages one to engage with the world, because it is Christ's world and we [being more than conquerors] have already won. We are to continue to pursue our main purpose in life - to glorify God in the midst of a dark but inevitably brightening world [and to evangelise the lost so they don't self-destruct just before things get better]. The Kingdom is all, and the Church is just the self-aware [ruling [if we get off our Chicken Little Duffs]] part of the kingdom