A supporter of Giuseppe Mazzini and proponent of human emancipation, Badii was a self-taught scholar who earned a diploma as an accountant and improved his economic position.

Due to his family's poverty, Badii had to leave school and began working in the mines at the age of fourteen in 1882, where he distinguished himself and eventually became a foreman.

[2] In 1911, Badii secured a stable position as the secretary of the Congregation of Charity in Massa Marittima, overseeing the Sant'Andrea Hospital and the Poorhouse.

[1] During World War I, he actively participated in civil assistance efforts and suffered from the loss of his son Pericle, who died in Trentino on 20 October 1918.

He promoted excavation campaigns in Massa, leading to significant discoveries like prehistoric "Tane" and Etruscan settlements around Lake Accesa.