Probably an impossible-to-find asset. Such a collaborative effort is likely to attract the most vocal and opinionated people, many of whom do not have children of their own. I am simply extrapolating from the median author of the parenting books I've read (and thrown away afterwards).
You may find that successful parents who balance two or more kids with full-time jobs and some measure of sanity will not have the interest or energy to put into such a project. The more enlightened among them may also hold their tongues, having realized that what works for their kids is not universal.
You may find that successful parents who balance two or more kids with full-time jobs and some measure of sanity will not have the interest or energy to put into such a project. The more enlightened among them may also hold their tongues, having realized that what works for their kids is not universal.