Under Spanish rule, the Philippines experienced slow economic development due to Spain's focus on Catholicism and expanding its empire elsewhere. While the Spanish introduced land ownership, abolished slavery, and established new industries, crops, and trade networks, much of the wealth generated benefited Spain and corrupt officials. The Spanish also imposed taxation and labor systems like encomiendas, tributes, and polo that oppressed Filipinos. However, in the 19th century Spain opened the country to foreign trade and investment and introduced improvements in transportation, communication, and banking that began developing the economy but also led to unrest and revolution among Filipinos.