ɪt wʌz ɹˌiːˈɔːɹɡənˌaɪzd ɪnðə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti z, ˈæftɚ ðə fɔːɹmˈeɪʃən ʌvðə spjˈuːsə baɪ ˈæktɪvˌɪsts hˌuː hɐdbɪn mˈɛmbɚz ʌvðə mˈʌtʃ lˈɑːɹdʒɚ sˈoʊʃəlˌɪst pˈɑːɹɾi ʌv ɐmˈɛɹɪkə.
It was re-organized in the 1970s, after the formation of the SPUSA by activists who had been members of the much larger Socialist Party of America.