I would have to say that we strive to make something bigger and better for one of three things:
To make lots and lots of money from it.
To simply be the best
Or to make it easier for us to do things if we have this.
Thoreau's <em>overall</em> viewpoint was that it was in solitude with nature that a man could really learn to thrive. He argued that a life of luxury was an unnecessary one and that a man could easily make a living without even having to sweat if he would just strip his life of unneeded, materialistic items. I hope this helps, although I am not sure how to narrow this down seeing as your question is incomplete.
I would say b, thats the best answer i would think of.
Answer:
the statement given is suggesting that many people had to worry about there own jobs and couldnt afford to be distracted by other people's problems with money therefore it destroyed alot of friendships and family relationships causing even more depression