How fitting that the world’s leaders are gathered in Copenhagen, where they can ask themselves that proverbial Danish question: To be or not to be? A Greenpeace-sponsored campaign unveiled in the city this week presents a stark image of the negation. World leaders who chose not to be – not to be the ones who imposed firm limits on emissions, who initiated clean energy infrastructure, who stopped deforestation – apologize from the future for their failings. But what the campaign doesn’t address is us. Who are we to be? The generation that held its leaders accountable and catalyzed real, systemic change? Or the generation that chose not to be – and took the entire planet down with it.