Complex sentence: In the end, Anne, pursued by an entire society bent on femicide, discovers the source and motivation behind the plague: an alien species is intentionally causing humankind to destroy itself, so that the aliens can have Earth for themselves.
Split into simpler sentences: In the end, Anne, pursued by an entire society bent on femicide, discovers the source and motivation behind the plague. Anne discovers that an alien species is intentionally causing humankind to destroy itself, so that the aliens can have Earth for themselves.