IU (Izquierda Unida) is a left-wing political coalition in Spain, founded in 1986. It brings together various political parties and groups that advocate for socialist and progressive policies. IU aims to promote social justice, environmental sustainability, and workers' rights, often positioning itself as an alternative to the mainstream political parties. The coalition has participated in regional and national elections, seeking to influence policy and represent the interests of marginalized communities. IU has historically been associated with the Communist Party of Spain and other leftist organizations, emphasizing solidarity and collective action in its political agenda.