Carver had to maintain the sanity and morale of the survivors, rationing food and water in the hopes that the Gateway would return before they all starved to death. Then, when Zach finally returned with the Gateway, Carver had again done the responsible thing and tried to put everything behind them. They had more important things to deal with than some petty disagreements from the past. But Zach's warped sense of morality couldn't just let bygones be bygones. Instead, he wanted Carver dead.
Narcissist
