The fractals theory and the chaos theory are complementary. The most natural phenomena, dealt by the chaos theory is of fractal structures, structures that depend on the scale used to measure them (Issachar, 1994). This means that the body size of various measured indices (section, area, volume) is not objective and is not of fixed value. Issachar (1994) argues that the geometric entities, with full dimensions, are an abstraction of reality that are useful for day to day engineering purposes.

What distinguishes “ordinary” types of objects that have complete dimension, from objects of fractal dimension? The difference is in different affiliation: the first type of objects (with the whole dimension) is found mainly in artificial objects made by man such as buildings, desks, chairs, and airports, have regular orders of magnitude, as being designed to serve the person and his needs. The second type of objects (with a fractal dimension) is found mainly in natural phenomena and objects.

Issachar (1994) notes that though we can’t accurately determine the future consequences of fractal systems, this systems create at the macro level, specific models and therefore forecasting is still possible.

In Issachar’s opinion (1994) we can predict the structure of the fractal system and accordingly to show that all the results, of any future systems, “fall” into a defined field that generates the same system structures and that there is no  dispersion or “escape” of the results to infinity.
This theory allows a different understanding of social systems behavior and among them the family. So far, the common argument is that it is difficult to identify the cyclical functioning of social systems and to predict future behavior. The possible conclusion is, according to  Issachar (1994), that cyclic functional patterns of human systems can be identified especially through their behavior.