People hold extreme views for a variety of reasons and palmistry can reveal why they think that way. People are often suspicious of radicals, especially of their motives. Are these people genuine or simply trying to attract attention or manipulating the public in some manner? Are they kooks of some kind? The hands can unmask a person's character quite well.
The dominant aspects of Richard Stallman's hands are the well-developed mounts of Moon and Venus, although Moon appears to be stronger. These developed mounts overshadow other mounts considerably, and this can create a lack of balance. The Saturn (middle) finger is a
