<p>Jefferson Airplane founder&nbsp;<a href="https://commons.wikimedia.org/wiki/File:Paul_Kantner_Jefferson_Starship_1975.JPG" target="_blank">Paul Kantner</a>&nbsp;died Thursday at age 74. He leaves behind his music that was enjoyed by San Francisco and later the entire country.&nbsp;</p><p>The singer and guitarist reportedly died of organ failure triggered by a previous heart attack. (Video via&nbsp;<a href="https://www.youtube.com/watch?v=L0gnnVcOLNc" target="_blank">Sony BMG Music Entertainment / Jefferson Airplane</a>)</p><p>Kantner was a lead of rock&#39;s counterculture movement and didn&#39;t shy away from his use of psychedelics. (Video via&nbsp;<a href="https://www.youtube.com/watch?v=actdqo7oXhk" target="_blank">ABC / &quot;The Dick Cavett Show&quot;</a>)</p><p>Billboard quotes him in the upcoming book, &quot;1967 - The Complete Rock History of the Summer of Love,&quot; as saying, &quot;<a href="https://commons.wikimedia.org/wiki/File:1966_Early_Jefferson_Airplane.JPG" target="_blank">Jefferson Airplane</a>&nbsp;had the fortune or misfortune of discovering Fender Twin Reverb amps and LSD in the same week while in college.&quot;</p><p>Founded in 1966, Jefferson Airplane performed at the biggest music festivals at the time including Woodstock, and its second album snagged the third spot on the Billboard 200. (Video via&nbsp;<a href="https://www.youtube.com/watch?v=0a0De6dmZZo" target="_blank">Sony BMG Music Entertainment / Jefferson Airplane</a>)</p><p>Kantner is survived by his three children and the other original members of the band.&nbsp;</p><p><i>This video includes images from Getty Images,&nbsp;</i><i><a href="https://commons.wikimedia.org/wiki/File:Paul_Kantner_Jefferson_Starship_1975.JPG" target="_blank">Grunt Records</a></i><i>&nbsp;and&nbsp;</i><i><a href="https://commons.wikimedia.org/wiki/File:1966_Early_Jefferson_Airplane.JPG" target="_blank">KRLA / Beat Productions</a></i><i>.&nbsp;</i></p>