The most influential homœopath after Hahnemann was the American, James Tyler Kent (1849 – 1916). He began his medical career as a practitioner of 'Eclectic Medicine', which was a combination of various medical practices of the 19th century. However, in 1877, his wife fell seriously ill and after the failure of all other types of medicinal treatment she was successfully cured by Homœopathy. From then on, Kent became a keen student of Hahnemann's work and soon adopted his teachings. 

Kent became renowned as a practitioner and teacher of Homœopathy, but it is as a writer that he has exerted a lasting influence. In the Lectures on Homœopathic Philosophy, he presents the homœopathic view of life and sickness in simple, clear language. Each lecture in this book explains and amplifies one of the fundamental principles from Hahnemann's Organon, so that everyone can grasp the truth and beauty of Homœopathy. 

Another essential book for homœopaths is Kent's Repertory, which is an alphabetical index of hundreds of thousands of symptoms produced in the 'provings' of medicines, listing all the medicines that produced each symptom. Kent's Repertory remains the standard reference used by most homœopaths. Without the Repertory, it would be very difficult for homœopaths today to find the correct remedy amongst the vast amount of information available in the provings.

Kent was a humble man. He wrote 'It always seems so strange to me to hear that I have attempted a departure from Hahnemann's teaching. I simply try to show what it means, and how to apply it after one hundred years of application. I have made no discoveries. I have nothing that I can call my own.'