The document summarizes four key agreements that helped establish peace and power-sharing in Northern Ireland: 1) The Good Friday Agreement of 1998 established the power-sharing system of government and democratic institutions in Northern Ireland. 2) The St Andrews Agreement of 2007 addressed issues that had suspended the power-sharing Executive between 2002-2007. 3) The Hillsborough Castle Agreement of 2010 transferred more powers to Northern Ireland in a sign of growing confidence in power-sharing. 4) The Stormont House Agreement of 2014 aimed to resolve political disagreements over welfare reform and dealing with the past that had caused another stalemate.