Party to the impeachment of Warren Hastings; tried to impeach Pitt; denounced union with Ireland; became leader of the House of Commons in 1806; carried Act for the Abolition of the African Slave-trade; succeeded to the earldom in 1807, and denounced the Bill against Queen Caroline; becoming Prime Minister in 1830 he was defeated, and resigned twice over the Reform Bill; returning to power in 1832, with permission to make as many peers as might be needed, he succeeded at last in passing the Bill; he was head of a powerful party in the reformed Parliament, and carried the bill abolishing slavery in the Colonies, but resigned over Irish troubles in 1834 (1764-1845).