Greatly concerned with social problems, Howard had developed in the 1890s his "Economic Credo" about "co-partnership" under which he envisioned the state, businesses and unions working together for the improvement of the working classes. Alongside his "Economic Credo", Howard believed in "Imperial Federation" under which Great Britain would be united in a federation that would take in Australia, Canada, New Zealand, Newfoundland, and South Africa. In 1897, Howard set up a rubber plantation in Tobago, which was partly intended to finance a "co-partnership" business in Britain and partly to demonstrate to the British working class how the British empire benefited them financially. Howard came from a cadet branch of one of the most famous Roman Catholic aristocratic families in England, but his grandfather had converted to the Church of England and Howard had been raised as an Anglican. In 1898, Howard converted to Roman Catholicism to marry the Countess Isabella Giustiniani-Bandini, who came from a "black" Italian aristocratic family who supported the Papacy in its refusal to recognize the Italian state, unlike the "white" aristocrats who supported the Italian crown against the Catholic Church. In 1903, following the failure of his rubber plantation together with a lack of public interest in his "Economic Credo" led to Howard rejoining the Diplomatic Service.