Lyric discussion by MrHighway 

Cover art for Unrest lyrics by Parkway Drive

I could be wrong (and probably am) but I think it's talking about how people these days are all the same, and no one really has their own opinionabout things; they just do the same as everyone else. "a monument to the depths of human misery" means if people continue to live like this for years to come eventually everyone will be miserable. That's what I think it means anyway.