founder of the Irish Land League (1879), which organized resistance to absentee landlordism and sought to relieve the poverty of the tenant farmers by securing fixity of tenure, fair rent, and free sale of the tenant's interest.

Davitt was the son of an evicted tenant farmer. In 1856—at the age of 10—he started work in a cotton mill, where a year later he lost an arm in a machinery accident. In 1865 he joined the revolutionary Fenian brotherhood, an international secret society that sought to secure political freedom for Ireland; he became secretary of its Irish analogue, the Irish Republican Brotherhood (IRB), in 1868. Arrested in London for sending firearms to Ireland (1870), he was sentenced to 15 years in prison and there laid plans to link Charles Parnell's constitutional reform with Fenian activism to achieve political-agrarian agitation.

Paroled in 1877, Davitt rejoined the IRB and went to the United States, where the Fenian movement had originated. There he was deeply influenced by Henry George's ideas about the relationship between land monopoly and poverty.

Back in Ireland, Davitt won Parnell's cooperation in organizing the Land League, which led, however, to his expulsion (1880) from the supreme council of the IRB. He was elected member of Parliament for County Meath (1882) but as a convict was disqualified. He was also imprisoned (1881–82 and 1883) for seditious speeches.

Because of his public championing of Henry George's theories of land reform, Parnell repudiated him. Davitt actively defended the Nationalists before the Parnell Commission (1887–89). When the Irish party was split in 1890 over Parnell's involvement in Capt. W.H. O'Shea's divorce case, Davitt was among the first to oppose Parnell's continuance as leader.

Davitt was elected to Parliament in 1892 and 1893 but was unseated in both cases. He was elected again, for South Mayo (1895), but resigned in 1899 in protest against the South African War. His book, The Fall of Feudalism in Ireland (1904), is a valuable record of his time.