[1] He was a friend of Gustave d'Eichthal, an author who was sympathetic to Africans and advocated mixed marriages to produce offspring with the complementary qualities of the black and white races.

[3] When John Stuart Mill visited Paris in 1830 he spent much time with Lanjuinais and Eichthal, finding the views of these young men refreshing and encouraging.

[7] Lanjuinais belonged to a small group of deputies who followed Tocqueville in supporting the Orleans monarchy while agitating for democratic reforms.

As Secretary and Member of the Finance Committee, he was a strong opponent of socialism, advocating a laissez-faire approach to economic issues.

[1][a] He was against paper money, and proposed to deal with the deficit by consolidating Treasury debts and issuing a loan for 200 million.

Lanjuinais was a member of the committee of inquiry into the events of 15 May and 23 June 1848, and sided with most of his colleagues in favor of repression.

He had retired to the country when he learned on 2 June 1849 that he had been appointed Minister of Commerce and Agriculture in the cabinet headed by Odilon Barrot.