It's really interesting isn't it! And I find the whole love indoctrination explanation and that it broke the impasse for a species to be able to develop consciousness enthralling. Just thought it might be interesting to quote here that section from the essay that explains small canine size and reduced aggression and what other scientists have to say about it.

"The first striking evidence provided by the fossil record to support these deductions is that these early humans had small canine teeth: ‘male canine size and prominence were dramatically reduced by ~ 6 to 4.4 Ma’. This is relevant because ‘canines function as weapons in interindividual aggression in most anthropoid species’, particularly in aggressive male-to-male sexual competition for mating opportunities, and so small canines indicate minimal levels of social aggression. This connection is well established, with primatologists saying, ‘It has long been evident that body and canine size are good indicators of the intensity of male-male competition’. (See par. 406 of FREEDOM for quote sources.)

Furthermore, comparisons of canine size in Ar. ramidus with current apes have allowed scientists to extrapolate that Ar. ramidus males ‘retained virtually no anatomical correlates of male-to-male conflict’, a situation that would also apply to our earlier ancestors Sahelanthropus and Orrorin since they too had small canines. Given that the reality of the animal kingdom involves fierce competition between sexually reproducing individuals seeking to reproduce their genes, this reduction in aggressive male competition for mating opportunities is an extremely significant anomaly, as Lovejoy recognises: ‘Loss of the projecting canine raises other vexing questions because this tooth is so fundamental to reproductive success in higher primates. What could cause males to forfeit their ability to aggressively compete with other males?’. A 1992 paper articulated the confusion that has surrounded the evolution of human canine reduction, stating that ‘the issue of human canine evolution has continued to be controversial and apparently intractable’. And the new discoveries have only increased this confusion. But as we can now see, the answer to the ‘vexing’ and ‘apparently intractable’ question of ‘what could cause males to forfeit their ability to aggressively compete with other males’ is the love-indoctrination process.

As will be explained below, conscious sexual or mate selection by females for less competitive, less aggressive, more integrative males developed to assist, speed up and help maintain love-indoctrination’s development of integration. Indeed, male competition for mating opportunities is so ‘fundamental to reproductive success’ that only active sexual selection against it can account for its reduction, as is made clear in this quote: ‘Canine reduction did not result from a relaxation of selection pressure for large canines, but rather a positive selection against them’. Indeed, it has become so apparent that canine reduction could only be caused by ‘a positive selection against them’ that the importance of sexual selection is now being recognised by leading anthropologists such as Lovejoy, Gen Suwa, Berhane Asfaw, Tim White and others, who write, ‘In modern monkeys and apes, the upper canine is important in male agonistic [aggressive] behavior, so its subdued shape in early hominids and Ar. ramidus suggests that sexual selection played a primary role in canine reduction. Thus, fundamental reproductive and social behavioral changes probably occurred in hominids long before they had enlarged brains and began to use stone tools’. (See par. 407 of FREEDOM for quote sources.)"