By 2980 many in the Clans were ready to return to the Inner Sphere. Citing The Remembrance, warriors noted that three generations had passed many times over, and that it was time to reestablish the Star League and end their self-imposed exile. This zealous faction called itself the "Crusaders." Other warriors embraced the Crusaders' views, not because they believed in the faction's interpretation of The Remembrance, but because they saw the Inner Sphere as an opportunity to prove themselves. Even the lower castes, particularly the merchants, who were always eager for new markets, began to agree that the Hidden Hope would be resolved by the Clans' return to the Inner Sphere.

The Grand Council had strong reservations about returning, mainly because of an almost total lack of information about events in the Inner Sphere since the Exodus. They expressed the fear that the Inner Sphere had not gone up in flames as predicted, but was united, as strong as or stronger than the Clans.

The council decided to form Intelser, an intelligence service whose operatives would move cautiously toward the Inner Sphere to gather information. Operatives traveling as independent traders made contact with and infiltrated the Periphery states, relaying what they learned to the Clans. By 2984, a somewhat confused picture of the Inner Sphere had begun to emerge.

The Clans learned that there had, indeed, been a holocaust, called the Succession Wars, as predicted by Aleksandr Kerensky. However, they mistakenly believed that the technological level of the Periphery domains was typical of the entire Inner Sphere. The Grand Council decided that the Inner Sphere was not a military threat. Those who wanted to return claimed that the conditions laid out by General Order 137 proved that the time was ripe: "When the time is right, when the strength of our will and our honor is humanity's only hope to struggle up from the ashes, only then can our strong descendants make the long journey to the home that is rightfully ours." The Crusaders felt these conditions had been fulfilled. The Grand Council agreed to discuss the Crusaders' call to arms, and thus began what would become known as the Great Debate.

The Clans eventually formed two camps, the Crusaders and the Wardens. The Crusaders were those who favored an immediate return to the Inner Sphere to reestablish the Star League according to the writings of the Kerenskys. The Wardens, on the other hand, believed that the Kerenskys had never meant their words to be read so literally. They asserted that the words were meant not as a command to future generations, but to stir courage. They believed the Clans' destiny was to develop their own culture, separate from the tainted ways of the Inner Sphere, but willing and able to come to the Inner Sphere's aid if menaced by any outside threat.

Though challenged to do so, the Wardens never clearly articulated what they meant by "outside threat." Some suggested intelligent life forms from beyond human-conquered space. Others made reference to the possibility of a despotic domain in the Inner Sphere whose principles ran so contrary to human decency that the Wardens would feel compelled to intervene.

At most, said the Wardens, the Clans should establish only the coolest of relations with the domains of the Inner Sphere, returning only if invited or if the Successor States collapsed through their own folly. Both sides supported their arguments with the writings of the Kerenskys, but neither side could claim a majority and force the issue. Individual Clans were divided over the issue, most being split almost evenly between the two suggested courses of action. This is the most divisive issue that the Clans have ever faced.

The debate lasted months, then years, during which the Crusaders slowly mustered a majority. Though Clan Wolf remained primarily Warden, even their influence could not stem the tide of support for the Crusaders.