The correlation between aggressive behavior and succes of a theropod

Entirely possible. Probably the best explanation yet to the Tyrannosaur's success.

Yours explanation proves to be very reasonable.  

I also think that maybe the tyrannosaurids and abelisaurids had different breeding habits than the carcharodontosaurids.  Perhaps they cared for their young for a longer period of time, or layed more eggs, or watched over the nest more frequently, or any combination of the three.

Seems completely legit. I can say I agree with this. 

it's interesting for sure, but i don't think these smaller theropods would go out of their way to attack larger ones, such as an allosaurus attacking a full grown torvosaurus. Not only is the megalosaurid stronger, it's....well...bigger

A prime example of this is the big cats and other animals of Africa. We don't see the wild dog, a fiesty little animal, going around and attacking the lions. Nor do the hyenas. But if a lion sees a hyena pup, it will kill it. Gets rid of competition. Same goes for the hyena. It all boils down to competition, and eliminating future threats.

Even male lions that take over a pride, will kill the cubs of the dominant male. They won't even eat them in most cases, just kill with a quick bite to the neck...then leave them for the scavengers.

it's interesting for sure, but i don't think these smaller theropods would go out of their way to attack larger ones, such as an allosaurus attacking a full grown torvosaurus. Not only is the megalosaurid stronger, it's....well...bigger

A prime example of this is the big cats and other animals of Africa. We don't see the wild dog, a fiesty little animal, going around and attacking the lions. Nor do the hyenas. But if a lion sees a hyena pup, it will kill it. Gets rid of competition. Same goes for the hyena. It all boils down to competition, and eliminating future threats.

Even male lions that take over a pride, will kill the cubs of the dominant male. They won't even eat them in most cases, just kill with a quick bite to the neck...then leave them for the scavengers.

it's interesting for sure, but i don't think these smaller theropods would go out of their way to attack larger ones, such as an allosaurus attacking a full grown torvosaurus. Not only is the megalosaurid stronger, it's....well...bigger

A prime example of this is the big cats and other animals of Africa. We don't see the wild dog, a fiesty little animal, going around and attacking the lions. Nor do the hyenas. But if a lion sees a hyena pup, it will kill it. Gets rid of competition. Same goes for the hyena. It all boils down to competition, and eliminating future threats.

Even male lions that take over a pride, will kill the cubs of the dominant male. They won't even eat them in most cases, just kill with a quick bite to the neck...then leave them for the scavengers.

double post..

Quadruple post...

Thanks guys. Yeah, I know that it still needs some polishing, but it does seem like a plausible theory for the largest part.

Acro Rex, are you familiar with the honey badger? It has been observed taking on and driving off lions, despite being many times smaller. Why? Because badgers are like weasels from hell. They' down. Also, hyenas are commonly seen harassing and taking on lions. Sometimes, being smaller creates a more aggressive attitude. It helps to make up for the animal's smaller stature. Just a thought.

I agree with what Acro said, African dogs themselves are much smaller then the hyena. However, the Hyena isn't that much smaller then the lion, and confrontations between the two are very frequent.

As for your honey badger anology, they are mainly acting in self defense - self preservation. I've noted those little animals are hyper aggressive, yet they do not go actively seeking confrontation with the larger carnivorous mammals. Nor do they challenge them for a zebra carcass.

I Believe what we have evidence of here, with the Tyrannosaur and Allosaur bite marks on the fossils, is evidence of predation, or just a territorial confrontation. Perhaps even part of a mating ritual, for we have no idea how violent these animals were in their breeding season.

Reptiles, crocodiles and lizards in particular, can be rather violent during mating season. They bite down on the back of their partners neck, assuring a better grip on their mate. I believe this is some of what we are seeing in the fossils, but not really being able to tell gender at this point, that's just a theory.