Kammala jumla mai zuwa: Arias ya sami kyautar Nobel ta Zaman Lafiya ta 1987 tare da taimakon John Biehl, takwaransa a Ingila, da Rodrigo Madrigal Nieto saboda aikinsa na sanya hannu kan yarjejeniyar Esquipulas II. Wannan wani shiri ne da aka tsara don inganta dimokiradiyya da zaman lafiya a kan tsakiya na tsakiya na tsakiya a lokacin babban rikici: 'yan tawaye na hagu suna yaki da gwamnatoci a cikin
El Salvador da Guatemala, waɗanda Amurka ta goyi bayan su a ƙarƙashin kulawar Yakin Cacar Baki; da Contras, wanda Amurka ta goyi baya, suna yaƙi da tayar da kayar baya ga gwamnatin Sandinista a Nicaragua; Honduras, kwanan nan da ke karɓar ikon siyasa daga sojojinta, an kama shi a tsakiya a matsayin tushen sojojin Amurka; kuma a kan iyakar Costa Rica, Panama ta fuskanci zalunci na mulkin soja na Manuel Noriega. Tare da goyon bayan Arias, rikice-rikicen makamai daban-daban sun ƙare a cikin shekaru goma (yaƙin basasa na Guatemala ya ƙare a ƙarshe a 1996).