I think the thing you're missing with this question is that "the world" isn't one big thing -- it's kind of a federation of different, smaller things experienced by each person.

For one person, The World may seem rather wonderful -- they have family they can rely on, friends and loved ones they can be with. They have a career they love -- or, at least, isn't draining the life out of them. They live in a place that's safe, relatively modern, and affordable for them. Their future prospects are good, and they have enough stability to plan for that future.

None of that is outlandish as a definition for a world that's good, I don't think.

But that "Good World" is not universally available to people. Where a person is born, when they're born, and to whom they're born can turn all of that pretty normal stuff into an absolute fantasy, not a possible reality that he or she can work for. Pile on top of these things poverty, disease, conflict, bad choices, and a host of other situational factors, and you can be looking at a life that ain't worth living by any stretch of the imagination.

You should count yourself lucky that you can even have the thought that your version of the world isn't such a bad place, 'cause for a lot of people, it's little different from living in a house on fire.

What you're asking is akin to "How do I convince someone who's blind that orange is the most beautiful of all colors?"