Pretty sure it was Darwin... While most scholars didn't travel long distances at that time, Darwin did. he experienced in remote areas the diversity of life and evolution of a species.
Ramona's behavior reflects diffusion of responsibility.
This term refers to the fact that individuals are less likely to do something and offer somebody help if they are located in large crowds. If they are surrounded by other people who are also not doing anything to help, these individuals are unlikely to do something about the problem either because they are hoping someone else will do it for them.
They were getting smaller after that time