Corsican immigration to Puerto Rico came about as a result of various economic and political changes in mid-19th century Europe; among those factors were the social-economic changes which came about in Europe as a result of the Second Industrial Revolution, political discontent and widespread crop failure due to long periods of drought, and crop diseases. Another influential factor was that Spain had lost most of its possessions in the so-called "New World" and feared the possibility of a rebellion in its last two Caribbean possessions—Puerto Rico and Cuba. As a consequence the Spanish Crown had issued the Royal Decree of Graces of 1815 (Real Cédula de Gracias) which fostered and encouraged the immigration of European Catholics that were not of Spanish origin to its Caribbean colonies.