Francisco de Vitoria in the context of "School of Salamanca"

Hugo Grotius (/ˈɡroʊʃiəs/ GROH-shee-əss; 10 April 1583 – 28 August 1645), also known as Hugo de Groot (Dutch: [ˈɦyɣoː də ˈɣroːt]) or Huig de Groot (Dutch: [ˈɦœyɣ də ˈɣroːt]), was a Dutch humanist, diplomat, lawyer, theologian, jurist, statesman, poet and playwright. A teenage prodigy, he was born in Delft and studied at Leiden University. He was imprisoned in Loevestein Castle for his involvement in the controversies over religious policy of the Dutch Republic, but escaped hidden in a chest of books that was regularly brought to him and was transported to Gorinchem. Grotius wrote most of his major works in exile in France.

Grotius was a major figure in the fields of philosophy, political theory and law during the 16th and 17th centuries. Along with the earlier works of Francisco de Vitoria and Alberico Gentili, his writings laid the foundations for international law. Two of his books have had a lasting impact in the field: De jure belli ac pacis (On the Law of War and Peace) dedicated to Louis XIII of France and the Mare Liberum (The Free Seas) for which Grotius has been called the "father of international law." Grotius has also contributed significantly to the evolution of the notion of rights. Before him, rights were, above all, perceived as attached to objects; after him, they are seen as belonging to persons, as the expression of an ability to act, or as a means of realizing something.

New Christian (Latin: Novus Christianus; Spanish: Cristiano Nuevo; Portuguese: Cristão-Novo; Catalan: Cristià Nou; Ladino: Kristiano Muevo; Arabic: المسيحيون الجدد) was a socio-religious designation and legal distinction referring to the population of former Jewish and Muslim converts to Christianity in the Spanish and Portuguese empires, and their respective colonies in the New World. The term was used from the 15th century onwards primarily to describe the descendants of the Sephardic Jews and Moors that were baptized into the Catholic Church following the Alhambra Decree of 1492. The Alhambra Decree, also known as the Edict of Expulsion, was an anti-Jewish law made by the Catholic Monarchs upon the Reconquista of the Iberian Peninsula. It required Jews to convert to Roman Catholicism or be expelled from Spain. Most of the history of the "New Christians" refers to the Jewish converts, who were generally known as Conversos (or in a more derogatory fashion Marranos), while the Muslim converts were called Moriscos.

Because these conversions were achieved in part through coercion and also with the threat of expulsion, especially when it came to the Jews, the Catholic Inquisition and Iberian monarchs suspected a number of the "New Christians" of being crypto-Jews. Subsequently, the Spanish Inquisition and then the Portuguese Inquisition was created to enforce Catholic orthodoxy and to investigate allegations of heresy. This became a political issue in the kingdoms of the Portuguese–Spanish Union itself and their respective empires abroad, particularly in Spanish America, Portuguese America, and the Caribbean. Sometimes "New Christians" travelled to territories controlled by Protestant enemies of Spain, such as the Dutch Empire, the early English Empire, or Huguenot-influenced areas of the Kingdom of France such as Bordeaux, and openly practiced Judaism, which furthered suspicion of Jewish crypsis. Nevertheless, a significant number of those "New Christians" of converso ancestry were deemed by Spanish society as sincerely Catholic and they still managed to attain prominence, whether religious (St. John of the Cross, St. Teresa of Ávila, St. John of Ávila, St. Joseph of Anchieta, Tomás Luis de Victoria, Tomás de Torquemada, Diego Laynez, Francisco de Vitoria, Francisco Suárez, and others) or political (Juan de Oñate, Luis de Carvajal y de la Cueva, Hernán Pérez de Quesada, Luis de Santángel, and others).

Indigenous land rights are the rights of Indigenous peoples to land and natural resources therein, either individually or collectively, mostly in colonised countries. Land and resource-related rights are of fundamental importance to Indigenous peoples for a range of reasons, including: the religious significance of the land, self-determination, identity, and economic factors. Land is a major economic asset, and in some Indigenous societies, using natural resources of earth and sea form (or could form) the basis of their household economy, so the demand for ownership derives from the need to ensure their access to these resources. Land can also be an important instrument of inheritance or a symbol of social status. In many Indigenous societies, such as among the many Aboriginal Australian peoples, the land is an essential part of their spirituality and belief systems.

Indigenous land claims have been addressed with varying degrees of success on the national and international level since the very beginning of colonization. Such claims may be based upon the principles of international law, treaties, common law, or domestic constitutions or legislation. Aboriginal title (also known as Indigenous title, native title and other terms) is a common law doctrine that the land rights of indigenous peoples to customary tenure persist after the assumption of sovereignty under settler colonialism. The United Nations Declaration on the Rights of Indigenous Peoples, passed by the UN General Assembly in 2007, illustrates the importance of land for Indigenous peoples and offers benchmark standards on the land rights of indigenous people. Statutory recognition and protection of Indigenous and community land rights continues to be a major challenge, with the gap between formally recognised and customarily held and managed land is a significant source of underdevelopment, conflict, and environmental degradation.