What did Jack mean?
The world's gone to the dogs.
What exactly did Jack mean by this? And it what context was it said? I always found that statement to be poignant.
There is only a split second between existing and being a mere memory. share
'The worlds gone to the dogs' - as Jack says.
To try to find an answer to your question, I think Jack is put-off by the greed and materialism of the modern-world, as well as the noise and pace of working life, reflected in the shots of him being dwarfed by high rise office blocks and disillusioned by the throb and din of the business fraternity, further demonstrated as he pensively mutters to himself, dis-connected from the conversations going on around him.
Hence, his escape into the wilderness and barren terrain of the hills and volcanic slopes, away from the dollar-bills and concrete-glass facades.
A few years have gone since I watched, so memory is a little sketchy.
The images of the adult Jack are fresh though.
I have in mind that the key issue is that Jack needs to become a father, and his world view is thus influenced.