To what degree, if at all, is violence and war necessary? How much violence is too much? And who should decide? How much, do we need violence in our world?

War and Violence

To what degree, if at all, is violence and war necessary? How much violence is too much? And who should decide? How much, do we need violence in our world?
How much (if at all) has the way society defines violence changed? Should it change more or less? Who determines this definition?

Diversity
Is there a way to increase or encourage diversity? How much is diversity even possible? What is the role (if any) of entertainment and media in diversity?

Climate Change and Environmentalism
Is climate change realistically manageable? What should we do about it, who’s responsibility is it? When will it be too late to do something about it? Is it already too late?