The <a href="https://en.wikipedia.org/wiki/Russell–Einstein_Manifesto" id="mwAUk" rel="mw:WikiLink" title="Russell–Einstein Manifesto">Russell–Einstein Manifesto</a> calls for a reduction of the risk of <a href="https://en.wikipedia.org/wiki/Nuclear_warfare" id="mwAUo" rel="mw:WikiLink" title="Nuclear warfare">nuclear warfare</a>.