While the fashion world spends a great deal of time obsessing about the comings and goings of top designers and executives, the beauty industry is seemingly less worried about succession. And yet, in recent months, the business has experienced a series of generational shocks: Tiffany Masterson, who essentially created the “clean beauty” category at Drunk Elephant, exited the brand she founded. So did Supergoop’s Holly Thaggard, who elevated sunblock from the drugstore aisle and popularized the notion of “unseen” sunscreen. Most recently, of course, Byredo founder Ben Gorham stepped down, three years after Puig took a majority stake in the fragrance company for more than $1 billion.