Kane very visibly has the weight of the world on his shoulders. As the Chancellor, conducting the lottery to determine who will be allowed to survive in the bunker is his responsibility, but it can't be easy for him.
Bellamy: Raven, we need you to get us off the ground before the death wave hits. What do you say? Can you do it? Raven: What do I say? I say that death wave can kiss my ass. Clarke: Good. It's settled. We're going back to the Ark.