Global warming: it accelerates the seasons so the weather is fickle all the time. We are living in the data without imminent catastrophe, hence the lack of urgency.
Nationalism: its rerise imbalances world order, making countries ripe to engage in games of zero-sum. An empire falls.
We sacrifice the long-game for short-term gains. The little things add up until they trigger an emergency. Yet, the alarm was on the whole time.