I share Alfred Nobel's conviction that war is the greatest of all human disasters. Infectious disease runs a good second.

Yes, if you want to say that I was a drum major, say that I was a drum major for justice. Say that I was a drum major for peace. I was a drum major for righteousness. And all of the other shallow things will not matter.

In this new century, we must start from the understanding that peace belongs not only to states or peoples, but to each and every member of those communities. The sovereignty of States must no longer be used as a shield for gross violations of human rights. Peace must be made real and tangible in the daily existence of every individual in need. Peace must be sought, above all, because it is the condition for every member of the human family to live a life of dignity and security.

There's a term that gets thrown around a lot – keyboard warrior. It's used to refer to someone who makes aggressive or abusive posts online, often anonymously. I like the name. In my mind, when I read something especially horrific on my feed, I imagine it's written by a lone person unacquainted with personal hygiene practices, dressed in a poorly fitted super hero costume – one that is baggy in all the wrong places.

Recently I had the privilege of joining ex German Chancellor, Angela Merkel on a panel. I have long been in awe of her leadership, not least for her endurance. She was in power for 16 years. I once asked her how she managed it, her response was "things have changed a lot."