These few sentences really shocked me due to the fact that 1000 years is a relatively short time and if we continue with the population growth as it is, we are in big trouble. If 500 years is all it takes for people to form a human carpet over the whole continent, then society as a whole has to decide how to go forward. It is an interesting dilemma as I can't imagine the human population ever decreasing with our technological advancements, unless something wiped out a chunk of the human race (natural disasters, pandemic, war, etc.). I wonder what the most humane way to decrease the population would be?

As I was reading this I thought of how humans do this in society, but can't seem to find any examples. I understand that other species have this group selection behaviour but I feel like women in society have the opposite effect in this situation. I find that places where there is more poverty also results in higher birth rates which simply adds to the situation. It is interesting that other species can regulate and know how many offspring is the ideal amount, but humans have a higher intelligence and somehow create more offspring than they can manage.

I think the author is a little too bold in this statement when they say humans who have too many children are too ignorant in most cases to be accused of conscious malevolent exploitation. I think ignorance is too strong of a word considering that some women have a limited choice of how many children they can have. I also noticed how the author then states that powerful leader and institutions encourage those individuals to rear more children than they are able? But this contradicts the statement before that says humans are too ignorant.

This sentence makes me confused as to why the "rest of the population steps in to keep the children alive and healthy?". What does the author mean by this? Do they mean adoption when referring to other people stepping in? I am also slightly confused as to why the author mentions this in an evolutionary perspective.

I would argue with this text because natural selection is not always the only reason for extinction. I wonder why Darwin believes that the extinction of species "almost inevitably follows on the principle of natural selection" when there are other factors like climate change or natural disasters that can make a species go extinct. For example, if an environment suddenly goes from warm to cold a species can still go extinct even if it was well adapted to its previous environment. I also wonder what Darwin means when he says "new and improved forms" replace older ones. Does he mean that the new species is always better, or is the new environment just better suited to that particular species? If you think about it, one successful species, such as the dinosaurs, were thriving until the meteor's crashed into the earth, leading to small mammals to survive and dinosaurs becoming extinct. However, the dinosaurs were the "more successful" species compared to the mammals that were largely prey.

Darwin realizes that the fossil record does not align with his views on the gradual evolutionary tract. I think this is important how he reflects on his own work even though it proves him wrong. This sentence really shows how Darwin thinks as a scientist rather than arguing that evolution is an established fact. I also did some digging to find more information on the Silurian system and it seems that Darwin already had a strong foundation for geology before he set out on his voyage due to all the geology references in this reading.

I know that this quote is famous but I still find it very touching and eye opening. Even the tiniest of advantages one animal has over another can mean life or death for that individual. I remember learning about the peppered moths in first year anth100 and I think this is a really great example of Darwin's point. A small difference in colouration could determine whether a moth is camouflaged from predators or easily spotted. As Darwin states in this paragraph, one small trait such as the colouration of a moth can lead to major impacts on the species as it evolves.

I find it mind blowing how Darwin came up with this theory without knowing anything about genomics or chromosomes. As we now know, sterile hybrids created by two separate species are sterile because of genetic incompatibilities such as a difference in chromosome numbers or structures. Despite not having any access to this information, Darwin still came up with this majour breakthrough in science that was the foundation for modern biology!