The Spice Girls' announcement of their reformation is a good opportunity to show how astrology works for groups of people. The band are a good example of astrological group dynamics, with their clear 'girl power' slogan and ethos.
Because not all of their birthtimes are known we have to omit the Moon, which is a shame, and also the Ascendant and Midheaven which don't matter so much for this particular purpose. So we're working with all but one of the planets.
A scan of their charts shows that there are two dominant patterns in their group dynamics. Interestingly, they both reinforce and echo each other. Note that there is no mathematical reason for this 'doubling up' to be the case. In both cases the theme is will-power and the use thereof.
The first pattern is a 7th harmonic connection between Sun, Mars, and the Sun/Mars midpoint. This is the very essence of the energy, vivacity, and 'in your face' attitude that the Spice Girls expressed, and which caught the imaginations of young and teenage girls the world over.
The second pattern is in the 12th harmonic, and is between Sun, Pluto, and the Sun/Pluto midpoint. This is another dynamic of strength and forceful self-expression. The 12th harmonic is not a harmonic of inspiration, as is the 7th, rather the 12th is a mixture of flow and tension, relaxation and effort, and to some extent contains the panoply of human experience.
Here are some quotes from a computer-produced report describing these planetary patterns. It was written without reference to the Spice Girls, or indeed any other group of people, and so represents an objective statement:
7th Harmonic: The seventh harmonic is one of passion and obsession and, has the potential to both inspire and ensnare. A group combined by this pattern will have an emotional intensity, a slight touch of neurosis, or will hover on the edge of obsession, and from this precarious position they will gain inspiration. If this is a family, the members of this group will be interwoven in a web full of power-plays, and held together by a psychic and spiritual links, and they will both love and hate each other in the same breath. In any other type of group, if they can hang in there long enough together as a team, they can experience a virtually divine inspiration, but the day to day business of the group may prove to be difficult. Passionate and highly creative, but never emotionally stable.
The Sun and Mars combination: This is the ideal pattern for this type of group for it shows that the group's heart is the desire for competition and challenge. It is important that all the members are encouraged by the group to win in their respective arenas, otherwise they will compete amongst themselves. This is a group that will fight for what they believe in. It may be a sporting group, or a group with political or moral cause, which they will assertively work for. Revelling in the physical, and endorsing physical achievement in its members, this is a rowdy, noisy, physical, successful, and competitive group which, if they can work together as a team, will win more battles than they lose.
12th Harmonic: This is the harmonic of human life which contains joy and laughter, tears and tragedy. For all the lower harmonics are contained in the majestic twelfth. So it could be said that the group which captures this pattern is capturing all of life, and because of this they will share a collective sense of completeness. Within the group, members will have an easy rapport with some of the other members, yet will barely talk with others; with some they may argue and never see eye to eye, while others will powerfully inspire them. The group, therefore, contains a great diversity of interactive potential, and a broad palette with which to work, whether for creative pursuits or in the achievement of solid results in the world of affairs.
The Sun and Pluto combination that speaks of relentlessness, this group will let nothing stand in the way in achieving its goals. This relentlessness may manifest as the super-human effort of a sporting team, or the dogged determination brought to a long, arduous task. With all this power and force, it is important that the group has a suitable goal, one that is worthy of the force of this strong combination. For if the goals are too easy, too small, too quickly achieved, then the group may find this combination leading them towards a much more sinister expression. Power-plays within the group, paranoia, even racism, can emerge, and the group may find itself preying on weaker individuals both inside and outside the group. This group needs to have a huge goal towards which it strives. The most important gift of the combination, however, is that in the marriage of the energies of its individual members, this group has the power to achieve such a goal.