"We can only improve this world if we are realistic about its complexities. The disagreements that we face are deeply rooted, and they often raise difficult philosophical as well as territorial issues. They will not be solved easily. They will not be solved quickly. The arms race is now embedded in the very fabric of international affairs and can only be contained with the greatest difficulty. Poverty and inequality are of such monumental scope that it will take decades of deliberate and determined effort even to improve the situation substantially. I stress these dangers and these difficulties because I want all of us to dedicate ourselves to a prolonged and persistent effort designed first to maintain peace and to reduce the arms race; second, to build a better and a more cooperative international economic system; and third, to work with potential adversaries as well as our close friends to advance the cause of human rights. In seeking these goals, I realize that the United States cannot solve the problems of the world. We can sometimes help others resolve their differences, but we cannot do so by imposing our own particular solutions."