What do you mean, 'this world'? Most of this world is run by authoritarians and dysfunctional democracies - and those regimes are the least immediate of the problems for any given individual living there. Those people do indeed care about what's really important - namely, their survival. Even in countries with more stable political systems, enthusiasm is often hobbled by ignorance, willful or otherwise. Take the fervor of support for intervention in Syria as an example.
There are many activists demanding a solution Right Now and who will Not Take No For An Answer, but these people are idiots. No amount of compassion is likely to resolve the civil war - it needs a handful of decisive victories to be won by a side that has the power to defeat all of the opposition forces, and it seems that no such group exists. Other examples of enthusiastic ignorance would be Occupy Albuquerque, Kony 2012 or the witless activists my Dad had to deal with in his old job, just misguided campaigns that held the attention of the public for a while and did bugger-all because nobody actually understood what the issues were or how what they were doing would affect anything at all. Most entertaining had to be all the Burque socialists demanding a halt of government support to businesses without a hint of sodding irony. If people cared about things that actually mattered the best we could hope for would be that the will of the people would be more faithfully communicated. That in itself is always a good thing, but what the people will might turn out to be a bad decision.