A great power is a sovereign state that is recognized as having the ability and expertise to exert its influence on a global scale. Great powers characteristically possess military and economic strength, as well as diplomatic and soft power influence, which may cause middle or small powers to consider the great powers' opinions before taking actions of their own. International relations theorists have posited that great power status can be characterized into power capabilities, spatial aspects, and status dimensions. Sometimes the status of great powers is formally recognized in conferences such as the Congress of Vienna or an international structure such as the United Nations Security Council (China, France, Russia, the United Kingdom and the United States serve as the body's five permanent members). At the same time the status of great powers can be informally recognized in a forum such as the G7 which consists of Canada, France, Germany, Italy, Japan, the United Kingdom and the United States of America.
What do great powers usually have?
military and economic strength, as well as diplomatic and soft power influence

The humanists' close study of Latin literary texts soon enabled them to discern historical differences in the writing styles of different periods. By analogy with what they saw as decline of Latin, they applied the principle of ad fontes, or back to the sources, across broad areas of learning, seeking out manuscripts of Patristic literature as well as pagan authors. In 1439, while employed in Naples at the court of Alfonso V of Aragon (at the time engaged in a dispute with the Papal States) the humanist Lorenzo Valla used stylistic textual analysis, now called philology, to prove that the Donation of Constantine, which purported to confer temporal powers on the Pope of Rome, was an 8th-century forgery. For the next 70 years, however, neither Valla nor any of his contemporaries thought to apply the techniques of philology to other controversial manuscripts in this way. Instead, after the fall of the Byzantine Empire to the Turks in 1453, which brought a flood of Greek Orthodox refugees to Italy, humanist scholars increasingly turned to the study of Neoplatonism and Hermeticism, hoping to bridge the differences between the Greek and Roman Churches, and even between Christianity itself and the non-Christian world. The refugees brought with them Greek manuscripts, not only of Plato and Aristotle, but also of the Christian Gospels, previously unavailable in the Latin West.
What caused a large migration of Greek refuges in the 1450s?
Greek manuscripts

Indigenous peoples in what is now the contiguous United States, including their descendants, are commonly called "American Indians", or simply "Indians" domestically, or "Native Americans" by the USCB. In Alaska, indigenous peoples belong to 11 cultures with 11 languages. These include the St. Lawrence Island Yupik, Iñupiat, Athabaskan, Yup'ik, Cup'ik, Unangax, Alutiiq, Eyak, Haida, Tsimshian, and Tlingit, who are collectively called Alaska Natives. Indigenous Polynesian peoples, which include Marshallese, Samoan, Tahitian, and Tongan, are politically considered Pacific Islands American but are geographically and culturally distinct from indigenous peoples of the Americas.
How are Pacific Islands Americans distinct from the indigenous peoples of the Americas?
geographically and culturally