Violence against women continues to persist as one of the most heinous, systematic and prevalent human rights abuses in the world. It is a threat to all women, and an obstacle to all our efforts for development, peace, and gender equality in all societies. Violence against women is always a violation of human rights; it is always a crime; and it is always unacceptable. Let us take this issue with the deadly seriousness that it deserves.

Our world is one of terrible contradictions. Plenty of food, but one billion people go hungry. Lavish lifestyles for a few, but poverty for too many others. Huge advances in medicine while mothers die every day in childbirth, and children die every day from drinking dirty water. Billions spent on weapons to kill people instead of keeping them safe.

You are already leaders. Your ideas, your actions and your decisions make a difference. More than any other generation, you have a voice. Social networking is changing how we interact - and it can change our world. You are in touch with peers from around the world. You understand the power of instant communication. I appeal to you to use that power for the common good, the power of communication and the power of networking.

Sustainable development and climate change are two sides of the same coin

This is the moral challenge of our generation. Not only are the eyes of the world upon us. More important, succeeding generations depend on us. We cannot rob our children of their future.

The future of any leader or political systems is to be determined by the people of the country.

Gender equality and women's empowerment have been a top priority for me from day one as Secretary-General. And I am committed to making sure that the U.N. leads by example.