The roots told the leaves there aren't enough water to last them over the drought. They requested the leaves to gather as much dew as possible and pass it to them before the tree starts to die. There were only a few days left before water runs out. The leaves didn't fully comprehend and just nodded their agreement. When they ran out of water and started to wilt, they blame the roots. In the end, the tree died.
Why? Cos no one bothered to listen to the roots.
What is the optimistic point of view of this? Ponder on and I'll continue it later.