So, if you&#x27;re trying to change public opinion, rather than changing the minds of the most people, you need to change the minds of the people who others respect and whose opinions influence those of others.<p>This also explains why some issues seem difficult to change public opinion on.  For instance, if you want to get a majority of people to care about privacy, or more specific issues such as encryption backdoors and spying, you need those people&#x27;s social circles to include many people who care.  Since those people also tend to disproportionately avoid social networks...