In researching and writing her book, Paoletti says, she kept thinking about the parents of children who don’t conform to gender roles: Should they dress their children to conform, or allow them to express themselves in their dress? “One thing I can say now is that I’m not real keen on the gender binary—the idea that you have very masculine and very feminine things. The loss of neutral clothing is something that people should think more about. And there is a growing demand for neutral clothing for babies and toddlers now, too.”
Also included were a number of paleontologists like Edward Drinker Cope and Alpheus Hyatt , who felt that the fossil record showed orderly, almost linear, patterns of development that they felt were better explained by Lamarckian mechanisms than by natural selection. Some people, including Cope and the Darwin critic Samuel Butler , felt that inheritance of acquired characteristics would let organisms shape their own evolution, since organisms that acquired new habits would change the use patterns of their organs, which would kick-start Lamarckian evolution. They considered this philosophically superior to Darwin's mechanism of random variation acted on by selective pressures. Lamarckism also appealed to those, like the philosopher Herbert Spencer and the German anatomist Ernst Haeckel , who saw evolution as an inherently progressive process.  The German zoologist Theodor Eimer combined Larmarckism with ideas about orthogenesis .