I see many anons are focusing on scenarios where big women peg little men because that is titillating to them. Don't deny it, soft boys.
But I see also that OP does not mention that there have to be men in the setting, only women. So let's consider:
>Through means magical or natural, a race of hominids dominates the world where all members are hermaphrodites
>it would be gross if they could have beards and things, so they'll be sexy women capable of a range of musculature, just with cocks and balls where the clit should be.
>These are women definitionaly, because they have everything a woman is and does, though they have no concept of multiple sexes among them.
>This radically alters their society from our own, as the pregnant and the impregnator is not pre-determined.
>Power dynamics are more universal and cut-throat, and social trust systems are either more heavily enforced or quite absent, leading to a split of highly regimented societies and brutish orc-like cultures of rule of the strong and cunning.
>As being a mother is far more of a burden than being a father, being impregnated is a humiliation and an assertion of dominance by the stronger amazon.
>Half or more of all combat is ritual combat to determine which mate will sire and which will bear the baby, even among loving couples.
>Marriage is a liberal concept among the more civilized and sedentary groups, with some religious orders even extolling the virtues of motherhood to the horror of traditionalists and barbarians
>Some fuedal-like societies exist where the high king is the husband of all her direct vassals, who in turn hold their own direct vassals as wives while themselves being pregnant with the king's children
>All slaves, and there are many captured in wars, are castrated and made permanently female.
>There are some mythical societies in this world where it's members have their vaginas sown shut at a young age and they take many slaves from other groups to reproduce only as the fathers.