Complex sentence: By the end of the century, the bikini went on to become the most popular beachwear around the globe, according to French fashion historian Olivier Saillard due to "the power of women, and not the power of fashion".
Split into simpler sentences: By the end of the century, the bikini had become the most popular beachwear around the globe. According to French fashion historian Olivier Saillard, this was due to "the power of women, and not the power of fashion".