The real question he's asking is "With all of the technology at our disposal, why haven't we solved society's problems?".
The answer is simple; society is run by human beings and human beings are inherently flawed beings. No amount of technology, communication, luxury or education can save us. There's going to be people that are going to try to control, dominate or otherwise harm other people, and this is never going to change.
Technology and done MUCH to improve the world; look at what organ transplants and other medical breakthroughs have done. But we'll never have a utopia despite our best efforts. We need to try for such a goal but need to accept that it will never happen.
It's the pursuit and effort that counts. Incidentally, the world HAS gotten better, hasn't it? More people can choose their own destinies than previously before; racial prejudice is on the run even though it's sadly still with us. Societies are generally becoming more free; many items that were luxuries are becoming items shared by more people around the world. We obviously have problems like war, greed, limited health care, unequal education, and other problems, but can you say we haven't made great strides in the past 100 years?