Peace is not unity in similarity but unity in diversity, in the comparison and conciliation of differences. - Mikhail Gorbachev

The Chernobyl disaster, more than anything else, opened the possibility of much greater freedom of expression, to the point that the system as we knew it could no longer continue. It made absolutely clear how important it was to continue the policy of glasnost, and I must say that I started to think about time in terms of pre-Chernobyl and post-Chernobyl.

What we need today is precisely this: political will. We need another level of leadership, collective leadership, of course. I want to be remembered as an optimist. Let us assimilate the lessons of the 20th century in order to rid the world of this legacy in the 21st – the legacy of militarism, violence against the peoples and nature, and weapons of mass destruction of all types.

United States "grew arrogant and self-confident" after the collapse of the Soviet Union, resulting in "a new empire. Hence the idea of NATO expansion".