In my magical version of Earth's history, at around the time that humans became anatomically modern 200,000 years ago, a variant of the human female gender arose with batlike wings around 6m wide when extended and feet that are more like birds' talons, who could fly thanks to the presence of magic. These females came to be referred to as Lilim, in reference to the best-known member of their gender, Lilith. Lilim and women each bred true, producing offspring that are either male or females of their own type. In a relatively short time (10-25 thousand years), despite lilim's birth rate half that of women (more on that later), the winged lilim form superseded the wingless woman form as the body form of all female humans, due in the most part to the lilim-form's greater survivability and ability to protect offspring in the hostile wild environment of the time.
To summarise, Lilim can fly quite well as long as there is background magic for them to draw upon. Individual lilim can also carry aloft loads roughly equivalent to at least their own mass, and each extra lilim co-operating can double that, up to a point that can nevertheless be almost preposterously high - on the order of millions of tons with the right team. Lilim are more like men in their psychology, including desire for social dominance and selection of sexual partners, tending more to select on the basis of appearance than for their ability to provide for offspring long-term as tends to be the case with women. They tend to prefer dominant sexual positions to those that leave them supine with their wings trapped against the ground (which would become a significant point of contention with men on earth)
Lilim differentiate from women at six to eight years of age (though sometimes the change may not begin until the early twenties, well post-puberty) as they grow wings and their feet change into talons over the following three to four years. Before this, it would take complex magic or chromosomal screening to tell if a girl-child of a lilim will become a woman or a lilim.
Lilim differ from women in that instead of having 2 X-chromosomes, they have 1 X and one L (which is larger than the X). XX offspring did not implant into the uterus due to fetal-maternal incompatibilities, and LY is also a lethal combination due to the lack of certain genes found only on the X-chromosome. A very rare individual can be born LXY - they are anatomically male with wings, but are sterile.
Anyway, when humans began to practise agriculture around 25,000 years ago, a disagreement arose between men and lilim. Men were the primary labourers while lilim continued to flitter around frivolously, and dormant genetic imperatives attracting men to women arose.
A male magician named Adam performed a spell that effectively modified the X-chromosome in one of his followers so that lilim could successfully carry XX woman offspring to term, as long as one of the X-chromosomes was the modified version, and as a result, the first of the new women, Eve, was born, eventually becoming Adam's 'wife'. The altered (genetically modern) X-chromosome spread both genetically and magically, and within a few thousand years, became the only extant version of that chromosome.
This means that modern lilim have a birth rate 3/4 that of women, perhaps a little more, and of the offspring who are born, approximately equal numbers will be male, women or lilim. With women continuing to breed true, producing only males and women, the mathematics of the situation was that - social selection aside - lilim were doomed to become extinct or a minority curiosity.
The most famous lilim, Lilith, discovered an airborne phenomenon that allowed flying beings to travel between worlds via air-filled tunnels (with lengths measured in the tens of thousands of kilometres rather than light-years) between stars which have orbiting oxygen-bearing worlds, known as the Gyre. Faced with the demise of her gender, Lilith conceived of an exodus of lilim to other worlds within the gyre where the dominant men of the time could not follow, and she and a large number of followers and a similarly large number of slave or captured men departed into the Gyre with literal mountains of supplies for a number of new worlds where they could forge new lives on the lilim's terms.
On earth, as magic declined after a major magical war, the remaining lilim lost their wings and talons and after a brief stint in legend and history as Amazons, became indistinguishable from women.
Multiple Lilim can lift around 70kg for around an hour, each doubling in mass or duration requiring an additional lilim, each of whom spends the minimal amount of their total magical power. The limiting factor is the magical power of the weakest member and the number of lilim that can touch at elast some part of the object (which may be a parcel of smaller objects).
A single lilim may linearly increase the mass or duration of a personal load by increasing the cost. This limits a typical lilim to 70kg for 15 hours or 70kg x15 =1050kg for 1 hour, at which point they would be magically exhausted, and would need to recover over the next 24 hours to be at full power again.
Should a lilim drop an object, the magical cost must be spent again to pick up another heavy object.
Lilim also have power over the winds for as long as they concentrate, at twice the cost of Lifting their base mass. They can create, still and direct winds up to 100 kph with one lilim, 180 kph with two, 240 kph with 3, 280kph with four, 300 kph with five and 320kph with six or more lilim. If two groups of lilim oppose one-another, each acting/opposing pair cancels each-other out, and only the unopposed lilim count for purposes of the wind their group can control.
Given that Lilim are entirely comfortable with heights and can, when co-operating, raise truly stupendous amounts of material into the air - and with a little magic, can pin a structure in the air relative to another nearby object (such as a point on the ground several kilometres below, or a nearby airborne structure) effectively permanently, allowing airborne towns, how might these lilim live? How would they treat men and women who would naturally be ill-at-ease living in an airborne lilim town? What would be the fate of their female offspring who proved to be women, not lilim?
I'm aware that there could be a lot of answers to this, but I'm looking for answers that leave Lilim as a significant part of human society in their new worlds, either as equals or dominant to the other genders.
Is it inevitable that lilim would need to live as mistresses over the men and sterilised outcast women (those that weren't killed for not being lilim) toiling below their lofty airborne cities in order to remain a viable part of their part of the human race, could some semblance of equality exist, or would there be worlds where the lilim have allowed themselves to dwindle and perhaps even vanish rather than become cruel mistresses over the rest of humanity?