Rubuta ci gaba don wannan sakin layi - A tarihi, jam'iyyar ta kasance daga reshen kwaminisanci na duniya wanda ya nemi wahayi daga Tarayyar Soviet. A tsakiyar shekarun 1960, Ma'aikatar Harkokin Wajen Amurka ta kiyasta membobin jam'iyyar kusan 100. Jam'iyyar ta ci gaba da girma a cikin shekarun 1960 da 1970. A ƙarshen shekarun 1960, wasu membobin IWP (musamman Michael O'Riordan) sun zama masu aiki a cikin Kwamitin Ayyukan Gidajen Dublin. Har ila yau, IWP ta yi Allah wadai da mamayewar Soviet na Czechoslovakia
, ko da yake O'Riordan ya yi tsayayya da wannan matsayi. A watan Maris na 1970, bayan haɗuwa da CPNI / IWP, sabuwar Jam'iyyar Kwaminis ta Ireland ta ba da sanarwar da ake kira "Don Unity da Socialism", tana ba da shawarar zaɓen gwamnatocin hagu a ɓangarorin biyu na Ireland, kuma, a ƙarshe, ƙirƙirar United Ireland.