As Wikipedia put it, "Throughout his life…Molinari defended peace, free trade, freedom of speech, freedom of association, and liberty in all its forms, and opposed slavery, colonialism, mercantilism, protectionism, imperialism, nationalism, corporatism, economic interventionism, government control of arts and education, and all restraints on liberty."
Sounds like my kinda guy.
A quote:
"…men who obtained power…were incessantly compelled to enlarge…the functions of the State. Ever occupied with…the maintenance of their own power, further charged with a multiplicity of incongruous functions, modern governments can with difficulty fulfill their task. This is the real explanation of the grossly inadequate performance of their first duty—protection of life and property of the individual."
And check out the references:
Gustave de Molinari, "The Production of Security"
Gustave de Molinari, The Society of Tomorrow
David Hart, "Gustave De Molinari And The Anti-Statist Liberal Tradition," Journal of Libertarian Studies
David Hart, "Gustave de Molinari; Life and Works," which also contains links to other electronic resources about or by Molinari, including in the original French.
Murray Rothbard on Molinari
The Molinari Institute