He represented these wealthy, Christian families who actively participated in society, akin to Édouard Aynard, though Rambaud's Catholicism was more conservative.

Influenced by the Church's social values, particularly the encyclical Rerum Novarum (1891), Rambaud developed an independent economic philosophy, avoiding alignment with traditional socialist or liberal schools.

Rambaud was described as "a doctrinaire intransigent who combined an economic liberalism inspired by Frédéric Le Play with a religious vision of world order.

During the French Third Republic, he supported free education and contributed to establishing the Externat Saint-Joseph civil society to protect property from Republican legislation.

He regularly wrote for Le Nouvelliste de Lyon, often anonymously, and published literary critiques under the pseudonym M. Tramoy.