Einstein believed deeply that science should transcend national and ethnic divisions. But he watched physicists and chemists become the purveyors of weapons of mass destruction in the early 20th century.
Depression can kill you. It can also be a spiritually enriching experience. It's really an important part of my theology now and my spirituality that life is not perfect, and I grew up wanting it to be and thinking that if it wasn't, I could make it that way, and I had to acknowledge that I had all kinds of flaws and sadnesses and problems.
Intelligence alone does not get us where we need to go or even necessarily where we want to go. For that, the human creature must exercise harder-won capacities of wisdom, and wise action.