Our biggest challenge in this new century is to take an idea that seems abstract - sustainable development - and turn it into a reality for all the world's people

I've been around enough to realise that there are two things that once people have them, they don't want to give up, and it's extremely difficult to convince them to give up: one is privileges, and the other is subsidies.

The United Nations has long recognised that the imagination, ideals and energies of young men and women are vital for the continuing development of the societies in which they live. And since its inception in 1948, AIESEC has contributed to this development by serving as an agent of positive change trough education and cultural exchange.

We're all human. After 10, 15 years you get tired, you run out of steam and ideas, you have to give a chance to somebody else. And whether you yourself are inclined to stay on, all those around you are pushing you to stay on for what they will gain.

The preservation of biodiversity is not just a job for governments. International and non-governmental organisations, the private sector and each and every individual have a role to play in changing entrenched outlooks and ending destructive patterns of behaviour

If you are neutral in a situation where one side is patently being mistreated, the conclusion is that you're siding with this wrong.

On this International Day of Peace, let us dare to imagine a world free of conflict and violence