Cape Verde when Portuguese explorers discovered and colonized the islands, establishing the first European settlement in the tropics. Ideally located for the Atlantic slave trade, the islands grew prosperous throughout the 16th and 17th centuries, attracting merchants, privateers, and pirates. The end of slavery in the 19th century led to economic decline and emigration. Cape Verde gradually recovered as an important commercial center and stopover for shipping routes. Incorporated as an overseas department of Portugal in 1951, the islands continued to campaign for independence, which was peacefully achieved in 1975. Since the early 1990s, Cape Verde has been a stable representative democracy,
Cape Verde–European Union relations of the beneficiaries of the EU's regional cooperation programme with Portuguese-speaking African countries (PALOP) countries: Angola, Guinea Bissau, Cape Verde and São Tomé and Príncipe. In March 2005 former Portuguese president Mário Soares launched a petition urging the European Union to start membership talks with Cape Verde, saying the country could act as a bridge between Africa, Latin America and the EU. Cape Verde's per capita GDP is lower than any of the current member states, accession countries, or candidate countries. However, it is higher than that of some of the EU-designated "potential candidate countries" of the Western Balkans like