In the twentieth century, we became adept at capturing, manipulating, and presenting precise visual copies of individuals through photography, film, and digital manipulation. Humans no longer had to use a hall of mirrors (or a skilled portrait artist) to see themselves doubled, tripled, quadrupled. We also became better at selective breeding and genetic manipulation. Dolly the sheep emerged from an adult cell in 1996, and attendant anxieties and sensational interest in the literal copies spiked Eventually, the concept of the double in art was superseded by the clone, as we slouched closer and closer to literal self-replication.
https://www.theparisreview.org/blog/2022/07/28/the-face-that-replicates/