The internet is unnatural. Lucretius (c. 75 BC) Citing Democritus, stated, "Nature never reduces anything to nothing." This does not apply to the internet.
Lucretius also gave a significant amount of attention to arguing the existence of air. I have great sympathy for his efforts even though I can only manage him in translation.

So, try again, as the psuedo-voce said.

The main point has been overlooked.

Dependence as a bimodal drive has not only implications for the general case of species evolution but also the special case of individual development.

Socialization as a means of competitive sexual selection does as well but then there are specific conditions of each species to consider.

(Look, I only get an hour online and it's running out.)

So for a couple examples. Consider the attachment that some humans have been known to make with juvenile chimpanzee's, there's dependence. Then what happens when the chimp reaches sexual maturity?
There's the rub. Chimp (pan) competitive mate selection differs markedly from human (h. sap). That's where the trouble comes from.
Although all (?) primates exhibit socialization as a component of mate selection, humans have advanced the behavior to a notable degree.
If all traits conducive to congregation entails socialization/enculturation then what traits are these?
All traits of communication, impulses towards socialization, etc. Go ahead, write your own list, but do it with Darwin. Do it for Darwin!
Dependence as a style of reproduction must of course occupy a special position in evolution.
So, yesterdays' news (to me).
Announcement of an archeological find, the oldest child, a juvenile proto-human skeleton some 3 million yrs. old. The individual's skull still developing indicates prehuman ancestry and is suggestive of dependence. Does this indicate the ancient quality of dependence as a drive? Nope. Dependence can be observed in some fish (bettas), reptiles (gator), dinosaur, avian, and yes, mammals.
The infant must command the parental response. Because it is an absolute mortal issue aberant ideation of mortality can be regarded as resulting from the intrusion of infantile, primary dependence, into the adult sexualized psyche. This only says what intrudes, it does not say why. So name a couple of aberrant ideations of mortality. As opposed to appropriate ideation of mortality.
times up-bye until next time
bah on emoticons - this means you, -smiley