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Minas Gerais' conspiracy

During the 18th century, mining exploration was strongly controlled by the Portuguese Crown, which imposed heavy taxes on everything extracted (one fifth of all gold would go to the Crown). Several rebellions were attempted by the colonists, always facing strong reaction by the imperial crown. One of the most important was the Vila Rica revolt that ended with the execution of Filipe dos Santos, the revolt's leader, but also with the separation of Minas Gerais from the captaincy São Paulo e Minas de Ouro. The most notable one, however, was the Minas Gerais conspiracy, started in 1789 by a group of middle-class colonists, mostly intellectuals and young officers. They were inspired by the American and French Enlightenment ideals. The conspiracy failed and the rebels were arrested and exiled. The most famous of them, Joaquim José da Silva Xavier (known as Tiradentes), was hanged by order of Queen Maria I of Portugal, becoming a local hero and a national martyr of Brazil. The Minas Gerais flag—a red triangle on a white background, along with the Latin motto "Libertas quæ sera tamen", "freedom albeit late"—is based on the design for the national flag proposed by the "Inconfidentes", as the rebels became known.

In the economic history of Brazil, Minas Gerais plays a pivotal role in shifting the economic axis from the Brazilian northeast (based on sugarcane, that starts declining in the 18th century) to the southeast of the country, which still remains the major economic center. The large amounts of gold found in the region attracted the attention of Portugal back to Brazil, progressively turning Rio de Janeiro into an important port city, from where these would be shipped to Portugal and where the Portuguese crown would eventually move its administration in 1808 after Napoleon Bonaparte's invasion of Portugal (see Transfer of the Portuguese Court to Brazil).

Due to the economic importance of the state and the particular traits of the local population—famed for its reserved and balanced character—Minas Gerais has also played an important role on national politics. During the 19th century, politicians such as José Bonifácio de Andrada e Silva were instrumental in the establishment of the Brazilian Empire under the rule of Pedro I and later his son, Pedro II. After the installation of the First Brazilian Republic, during the early 20th century, Minas Gerais shared the control of the national political scene with São Paulo in what became known as the " coffee with milk politics " (coffee being the major product of São Paulo, and milk representing Minas Gerais' dairy industry, despite the latter also being an important coffee producer).

Minas Gerais was also home to two of the most influential Brazilian politicians of the second half of the 20th century. Juscelino Kubitschek was president from 1956 to 1961, and he was responsible for the construction of Brasília as the new capital of Brazil. Tancredo Neves had an extensive political career that culminated with his election in 1984 to be the first civil president after the 1964 military coup. However, he died after a series of health complications just as he was about to assume the position. Also, Itamar Franco, former president of Brazil, lived there, though he was not born in Minas Gerais.