Russell Hittinger
He has played a role in the writing of papal encyclicals for three popes , his Social Science Academy together with the Pontifical Academy of Science drafted a first report on the global environmental issues only a year before Pope Francis's 2015 encyclical "Laudato si'" . 
<triplet> Laudato si' <subj> papal encyclicals <obj> instance of <subj> Pope Francis <obj> author <subj> 2015 <obj> inception