Are there any widescale mating paradigms that might work as a replacement for traditional monogamy? And by that I mean systems that successfully address the issues that monogamy tried to address:

- Raising healthy children in a stable environment with male and female role models

- keeping men motivated, socialized and invested in society

- dealing with issues related to too many males being sexually disenfranchised by women's innate sexual selectivity and hypergamy

- get to a healthy birthrate

- keeping jealousy, lust, and overall sexual preoccupation in check so that society doesn't waste all its vital energy thinking about sex and having sex, etc.

Where are we headed? Is there any other system that might work better? How can we deal with the above issues?