F. W. Mott, "Syphilis as a Cause of Insanity," British Medical Journal, October 18, 1902.
It can seldom be proved in more than eighty per cent. of cases, but in twenty per cent. of old syphilitic cases it is commonly impossible to find traces of the disease or to obtain a history of it. Crocker found that it was only in eighty per cent. of cases of absolutely certain syphilitic skin diseases that he could obtain a history of syphilitic infection, and Mott found exactly the same percentage in absolutely certain syphilitic lesions of the brain; Mott believes (e.g., "Syphilis in Relation to the Nervous System," British Medical Journal, January 4, 1908) that syphilis is the essential cause of general paralysis and tabes.
Audry. La Semaine Médicale, June 26, 1907. When Europeans carry syphilis to lands inhabited by people of lower race, the results are often very much worse than this. Thus Lambkin, as a result of a special mission to investigate syphilis in Uganda, found that in some districts as many as ninety per cent, of the people suffer from syphilis, and fifty to sixty per cent, of the infant mortality is due to this cause. These people are Baganda, a highly intelligent, powerful, and well-organized tribe before they received, in the gift of syphilis, the full benefit of civilization and Christianity, which (Lambkin points out) has been largely the cause of the spread of the disease by breaking down social customs and emancipating the women. Christianity is powerful enough to break down the old morality, but not powerful enough to build up a new morality (British Medical Journal, October 3, 1908, p. 1037).