It is clear to me that there is a ring speciation going on where educated rational people (ERSSG) are at one side of the ring and belief based generally undereducated people (UFSSG) are at the other. In between are the educated believers (EFSSG) who may do well in technical and even science that does not require critical and rational thinking. Other parts of the ring includes educated secular (ESSSG) where the SSGs like spectator sports and even some business organizations. Thinking and analysis is discouraged in favor of fitting into the group ethos. Educational achievement is quite varied in this group, but is of less value than knowledge of the details and social values of the chosen SSG. Throughout I will be using the concept of Social Support Group or SSG to designate the parts of the ring.
The speciation is due to mating habits. ERSSG couples breed late and selection is on willingness of the male to share parenting among other things. The women will generally choose the second to last year of academia for the first child. Mid to late 20's for most. The third year of med school is known as the breeding year for female med students. Marriage optional although the man is generally securely pair bonded. The woman's choice to eliminate the contraceptive is the key to breaking into this species.
The UFSSG part of the ring is the traditional male dominated, male choice paradigm, with marriage and then first child at the end of high school for the woman. The man is typically a few years older, and established in whatever job he is building a career in. The couple formed in high school or church, and the assumption is that the female will drop out of education and work at child raising at least for the early years for the first children, although this typically stretches out with volunteer and church related activities. Typically the main SSG is the church and the ethos is belief and conforming to the church community. Education is generally a low priority, and in many cases actively opposed where it might interfere with the faith. When this works it works well, and provides the basis for many successful religious communities. The downside is that statistics show that stability of the pair bond is weak, as the male domination and role separation encourage straying by the man and subsequent failure of the family unit typically while the children are still young.
The EFSSG in the ring is a traditional corporate career path where education is encouraged and rewarded but loyalty and "belief" in the organization is expected. The ethos is still male dominated, with women in the supporting and child care role. Marriage is generally later with the women getting their Mrs. in college while the men prepare for their corporate careers. Education is generally practical and directed with little emphasis on the thought provoking subjects. Graduate work if any is similarly practical and directed with the aim of corporate style research although that may be in a university environment. But the concept of traditional family style with the woman as social support for the man and in charge of home economics, child care and socialization. Outside work for the woman will typically focus on volunteer activities, possibly church related but usually secular. Typically for the EFSSG the ethos is for a stable family.
Another connector is the relatively undereducated non faith oriented USSSG. In this group ad hoc social groups are common frequently revolving around spectator events, and in the worst case TV and talk radio groupies. Breeding habits in this group are casual social encounters usually in bars, or popular music concerts, etc. Hook-ups for sex and/or pair bonding are the norm. The pair bonds may be lasting but generally are temporary. Children are the responsibility of the woman with or without the support of the fucker. There is little movement to the ERSSG, but there is some movement between the other SSGs.
The ends of the ring are breeding couples only. Evolution doesn't "care" about non breeders. Some will op out of the breeding cycle although not of sexuality depending on contraception to prevent undesired progeny. Certainly there is a lot of room in the middle of the ring for many variations on the theme. A common mix of education for the men and traditional role for women involves usually a major age difference with the male breeding at the completion of the educational phase and selecting younger women from the church as parent. The man will continue in the traditional role of provider for the family and the woman and church will do the parenting and socialization.