▁was ▁Dr ▁Em ilio ▁F rug oni , ▁a ▁prominent ▁advoc ate ▁of ▁social ist ▁ideas ▁in ▁Uruguay . ▁Its ▁central ▁organ ▁was ▁the ▁newspaper ▁Germ inal , ▁later ▁su pers eded ▁by ▁El ▁Sol . ▁ ▁The ▁party ▁was ▁a ▁member ▁of ▁the ▁Labour ▁and ▁Social ist ▁International ▁between ▁ 1 9 3 2 ▁and ▁ 1 9 4 0 . ▁In ▁ 1 9 5 1 ▁it ▁joined ▁the ▁Social ist ▁International , ▁which ▁it ▁later ▁left ▁in ▁ 1 9 6 0 , ▁and ▁rejo ined ▁it ▁in ▁ 1 9 9 9 . ▁In ▁ 2 0 1 7 ▁the ▁party ▁once ▁again ▁with d rew ▁from ▁the ▁Social ist ▁International ▁and ▁joined ▁the ▁Progress ive ▁Alliance . ▁ ▁In ▁ 1 9 7 1 , ▁the ▁party ▁was ▁one ▁of ▁the ▁found ing ▁members ▁of ▁the ▁Broad ▁Front , ▁a ▁left - wing ▁coal ition ▁than ▁won ▁the ▁ 2 0 0 5 ▁election , ▁also ▁elect ing ▁one ▁of ▁its ▁affili ates , ▁Tab ar é ▁Vas quez , ▁as ▁president . ▁▁ ▁It ▁is ▁currently ▁led ▁by ▁Gonz alo ▁C iv ila . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Official ▁webpage ▁( in ▁Spanish ) ▁ ▁Category : 1 9 1 0 ▁establish ments ▁in ▁Uruguay ▁Category : Ant i - imper ial ist ▁organizations ▁Category : B road ▁Front ▁( U ruguay ) ▁Category : D em ocr atic ▁social ist ▁parties ▁in ▁South ▁America ▁Category : Form er ▁member ▁parties ▁of ▁the ▁Social ist