Whakaotihia te rerenga e whai ake nei: I te tau 1844, ka noho a Pecqueur hei kaihauturu mo te niupepa manapori nui, "La Réforme", i whakahoutia e te reipa maui o Alexandre Ledru-Rollin. I hoatu e tenei ki a ia he papa whanui mo ana whakaaro, a ka whakapiri atu ia ki etahi atu o nga kaitohutohu o te hapori o te wa, tae atu ki te kaitohutohu o Louis Blanc. I te tau 1848, i tautoko a Pecqueur i te
Ko te Huringa o Hui-tanguru. I te wā i riro ai a Blanc hei Minita Mahi i roto i te Kāwanatanga Wātea hou o te Reipa Tuarua, i whakatūria e ia te Komihana o Rūhia ki te pātai o "te whakahaere o te mahi" me te whakatu a Pecqueur ki tōna rōpū. I roto i ona hoa i te Komihana o Luxembourg ko te economist liberal orthodox a Pierre Le Play me te Fourierist socialist Victor Considerant. I mahi tahi a Pecqueur me Considerant me te kaha ki te whakauru i nga whakahoutanga maha, penei i te whakawhitiwhitinga huihuinga me te putea a te kawanatanga mo nga koroni ahuwhenua, whare hapori me nga awheawhe mahi. I whakaingoatia hoki a Pecqueur ki te tūranga o te kaiāwhina kaiwhakahaere o te Bibliothèque Nationale. I raro i te "nom de plume" 'Greppo', i whakaputaina e ia he pukapuka rongonui i huaina ko "Catéchisme social" (1848) hei whakatipu i ona whakaaro. I whakapā atu hoki ia ki nga Communist Republican penei i a Jean-Jacques Pillot.