[Extra] Power of minorities

Minorities are very influential when they are persistent and consistent. They need to make their case repeatedly so that people can see its continued relevance. Major social changes, such as the abolition of slavery, began with the influence of just a few people, but as they stuck with this principle more and more people became convinced by their arguments, until eventually social change was able to happen. In the case of national wars, these minority influences may take considerable time to have an effect, but over time they begin to challenge the generally held belief that the war is justified. It took several years, for example, for the minorities opposed to the US war in Vietnam to have an effect, but eventually they were able  to convince enough people of their case that the US government perceived a need to end the conflict.