The two data processing sides of our upper brain are separated by a deep cleft because they are doing opposite things that cannot be done in the same space. The left hemisphere, "Splitter", is doing top-down analysis of the important details. In contrast, the right side "Lumper" is doing bottom-up analysis of the big picture. Since there only can be one Executive in a bilateral brain, we are each born with our Executives located either in the left of the right hemisphere. This makes us inherently either a right brain-oriented person (RP) or a left brain-oriented person (LP). This topic is called Hemisity. Surprisingly, many of the traits found among RPs of either sex were similar to traditional feminine traits while LP traits of either sex are thought to be masculine. That is LMs (males) were more similar to LFs (females) than they were to RMs or RFs. Similarly RMs and RFs were more similar in behavior than they were to LMs or LFs. This powerful new insight to gender is developed further here.
In courtship and marriage, there are four possible hemisity combinations: RM-LF, RF-LM, RM-RF, and LM-LF (where M and F are male and female). The first two represent unrecognized Patripolar and Matripolar human lineages, the latter two are unnatural hybrids between those two. This new topic is called Familial Polarity. Referring to hemisity, it was found that the "opposites attract" of the first two pairs (above) were the most common human mating combinations. The behavioral orientations of the Patripolar and Matripolar lineages are reversed-conflicting, and have led to historic misunderstanding and disagreements. In fact these differences can be shown to be at the heart of global conflict. The Patripolar Axis nations and the Matripolar Allies bitterly fought two world wars. Similar conflicts are now ongoing. Understanding these differences is central to terminating human violence, from the personal to the international. YOU NEED THIS INFORMATION.