Johnson announced that he would not run for a reelection, and that's when Humphrey decided to run, launching his campaign for presidency right after. Considering that he was loyal to Johnson's administration policies considering the Vietnam War, his own party disliked the idea of him running and they opposed to it, since they disagreed on how Johnson was dealing with it all.
It means that a group of people/a civilization that isn't/does not become open to new ways, and doesn't seek and desire new knowledge, is surely destined to be destroyed eventually. As progress and adaptation is probably the best way to secure your survival.
If I'm correct it's b I think know
Germany lost the war because it was overwhelmed by surmounting enemy forces; it was out of soldiers and ideas, and was losing ground every day by October 1918.
