Not just &quot;our caveman ancestors&quot;, but I think most historical societies features a greater degree of both intergenerational support and &quot;lateral&quot; support from other families for shared child-rearing tasks than has generally been the case in industrial to post-industrial capitalist (and the more capitalist-leaning of the modern mixed) economies (the more socialist-leaning mixed economies in some cases probably, while still featuring less intergenerational familial support than earlier societies, may come closer, or even exceed, the <i>total</i> support through increased lateral support through state mechanisms.)