The lack of development across the world leads to several left out parts (such as depression). That backfires as a lack of culture, studies and support each other. Support is much more than just "hey I am smiling, why are you not".
If you give someone no reason to live they will eventually strive for it. Development gives people a reason to exist, creates a much better environment for all of us, puts you in challenge, and your life has goals... that will be of great help to others.
So people won't have to worry about being depressed or lonely, but rather they have a task to do and the environment will give you the tools for it.
I am beginning to see development changes in Chile, and I am content with it.