Deák spent most of the 1850s in semi-retirement, tacitly supporting various national causes without engaging in active politics. He, however, refused to assume any public role, office or position, thus becoming an emblem of the so-called passive resistance. He sold his estate to István Széchenyi, and moved to Buda to become the de facto leader of Hungarian public life. He steered a middle course between advocates of a second anti-Habsburg uprising aligned with Kossuth, and pro-Austrian collaborationists. The crisis attending the Second Italian War of Independence in 1859, with strong Hungarian popular support for the Italian cause, returned him to active political life, although he opposed the initial Austrian reform proposals of 1860. In 1861, he became the leader of the group calling for a petition to the Austrian crown, throwing the onus for a settlement onto the Habsburg court. In response to his prompting, Franz Joseph I dismissed his current administration and called for a new parliament to negotiate the settlement. Deák led the committee tasked with drafting a formula, working alongside Kálmán Tisza and other prominent contemporary politicians. The Austro-Prussian War of 1866 came just as they had completed their work, but Deák resisted extremist pressure to reopen the issue.