Carlos Calvo (February 26, 1824, Buenos Aires – May 2, 1906, Paris) was an Argentine publicist and historian, who devoted himself to the study of the law.
In 1860 he was sent by the Paraguayan government on a special mission to London and Paris.
Remaining in France, he published in 1863 his Derecho internacional teórico y práctico de Europa y America, in two volumes, and at the same time brought out a French version.
The book contained the essence of what has come to be known as the Calvo Doctrine.
The book immediately took rank as one of the highest modern authorities on the subject, and by 1887 the first French edition had become enlarged to six volumes.
Calvo's next publications were of a semi-historical character.