Homeopathy, founded by the German physician and chemist Samuel Hahnemann in the late 1700's, based on a principle he observed in his practice. Hahnemann called this the principle of "like cures like." It's a principle you can observe in the world around you: coffee is known to give some people the jitters, but for kids who are already jittery with ADD, a cup of coffee can be calming. In homeopathy, this is called the Law of Similars. Consider the common onion. A big onion can bring tears to your eyes as you cut it open. So, as you might expect, someone who'd be helped by homeopathic onion (All-c) would have, among their symptoms, watery eyes and a runny nose. So, we see how in something that's capable of producing certain symptoms can also be helpful in calming them.
As homeopathy grew and flourished, and time passed, others made strides advancing the field. This page will be enhanced with those names in future weeks and months.