of the silver bullet
applies to any straightforward solution perceived to have extreme effectiveness. The phrase typically appears with an expectation that some new technology
or practice will easily cure a major prevailing problem. Some have seen such apparently miraculous drugs as salvarsan
as "silver bullets".
Experts often use the term more cynically to dampen unreasonable expectations. Doctorss, for example, will often readily characterise the latest fad diet as "no silver bullet".
The term originates from the mythology of werewolves: allegedly, only a silver bullet could kill a werewolf. As a more modern popular culture example, the Lone Ranger also used silver bullets.