Or, conversly the Christian might say “The world is getting worse even so come Lord Jesus” who said “My kingdom is not of this world”
The PM position can certainly be seen as an optimistic one but should our optimism be focused on us changing the world through influence or Christ changing it through regeneration?
Definitely the latter. As men are regenerated by the Holy Spirit, the Holy Spirit makes himself known in this world. Tangible, positive results, IMO. God so loves this world He gave His only begotten Son to redeem it.