As foreign secretary he organized and chaired the London Conference of 1830, which resulted in an independent Belgium.  
He was nicknamed "Lord Cupid" for his womanizing and had an affair with Mrs. O'Kane. As foreign secretary he organized and chaired the London Conference of 1830, which resulted in an independent Belgium.  He was generally a proponent of "gunboat diplomacy" as in the Don Pacifico Affair of 1850. Replacing Russell as Prime Minister, his nearly ten years in office are known as the "reign of moderate liberalism" which saw the U.S. Civil War and the Crimean War. For 10 points, identify this Liberal nicknamed Pam, who served until 1865.
He was nicknamed "Lord Cupid" for his womanizing and had an affair with Mrs. O'Kane.
Henry John Temple, 3rd Viscount Palmerston (accept either)