Here is a wonderful documentry by Hans Rosling. I recommend watching it all but what is particularly interesting is between 32-42 minutes there is the story of how the poorest in Mozambique are aspiring to buy bikes to get out of poverty.
What seems interesting is once families get a bike, they aspire to get a motorbike->car->fly places; the path to materialism, but there's nothing wrong in wanting a washing machine.
So eliminating poverty is one challenge, the other is for rich countries to find a way to maintain a good quality of life that billions around the world aspire to but do it in a way that does not consume the resources and pollution that we do today. We need a good modern lifestyle that sustains 11 billion people.