caveat bullshit
this is a quasi-historical text that both documents and 
justifies
 the norman invasion of southern italy. unfortunately, as our sources 
for this period are not very good, we have no option but to rely on 
shoddy quasi-mythical histories and deductive logic to build an 
understanding of these events. 
malaterra begins by providing a rational explanation for the migration: some of the twelve sons of 
tancred d'hauteville
 looked around their father's realm and decided that it could not be 
split up in a way that would provide enough land (and slaves, no doubt) 
for all of them. they decided that it would be in the benefit of all of 
them to look elsewhere for new land rather than to engage in conflicts 
with each other. this explanation of the norman migration south is 
certainly appealing in it's logic, as well as it's biblical simplicity, 
but does it hold up to careful scrutiny?
malaterra's narrative is actually really not that far removed from 
the contemporary explanation of the viking migrations and invasions as 
being driven by a combination of population growth and climate change. 
yet, why would they feel the need to go as far as italy? if they were 
truly such powerful warriors, why not subdue the land around them and 
build a great empire? the text provides an answer, actually: god led 
them to apulia. yet, i think that modern scholarship requires a better 
answer than that they were led by god. if we acknowledge the consistency
 between malaterra's explanation and the contemporary scientific 
explanation, we still haven't answered the question of "why did the 
normans go to 
italy?".
whatever the reasons for them leaving normandy were, they were 
first accepted into the employ of the prince of capua (pandulf IV), who 
paid them to attack the prince of salerno (guaimar IV)). in time, the 
prince of salerno offered a higher wage and the norman mercenaries 
instead attacked the prince of capua (in 1038). 
so, the narrative actually breaks from the fictional background 
fairly quickly - the normans came to italy not as conquerors looking for
 land but as invited mercenaries in the employ of local aristocrats. the
 wealthy italian (lombard in background) princes were probably looking 
to build up their personal varangian guards to aid in defense and in 
conquest. having viking mercenaries in one's army was fashionable 
amongst the mediterranean despots of the period. 
so, we can answer the question of "why 
italy?" with some 
certainty - because they were lured into a mercenary army by the promise
 of a steady pay check. it should also be noted that norman mercenary 
armies were already established in southern italy before any members of 
the de hauteville family arrived. so much for divine guidance.
the empire, of course, was very sensitive to the existence of large
 barbarian armies on it's peripheral. in general, it would prefer to 
avoid that altogether. yet, if these barbarian armies must exist then 
self-preservation demanded they be played off against each other. see, 
because barbarians are barbarians, it follows that they are easy to 
control through appealing to their barbaric nature. this is the 
fundamental axiom of greek military strategy over two thousand years 
worth of history. as such, the normans were convinced to attack the 
saracens in sicily, under the command of the general maniaces.
the diversion was initially successful, but it very quickly 
backfired. the normans did attack sicily, but they also attacked 
byzantine italy almost immediately afterwards. malaterra justifies this 
by arguing that the greek general refused to share the booty from the 
raid, but this is blatant whitewashing that is not at all consistent 
with byzantine strategy and makes almost no historical sense. rather, 
the invasion was called off by maniaces halfway through the conquest. 
the causes of the called-off invasion seem to be well understood and 
have to do with byzantine politics; the normans seem to have plundered 
italy simply because they were brought back there before they got the 
chance to plunder sicily. in any case, the empire walked out of this 
episode in barbarian management with no greater control of sicily and a 
new barbarian headache in southern italy that had to be addressed 
immediately. several attempts to expel the normans were met not just 
with failure but with greater losses; the byzantines eventually had to 
admit defeat, and it was with this defeat that italy was lost to 
constantinople forever.
the way things worked at the time was that if you didn't want to 
pledge allegiance to the emperor then you had to pledge allegiance to 
the pope (or face genocide). so, successfully expelling the byzantines 
meant inviting a papal invasion. while the normans, under humphrey, are 
said to have defeated the invading germans, they were also coerced into 
the roman church's hegemony (and out of constantinople's sphere) by the 
granting of a fief. see, when you defeat the church in battle that means
 that it must acknowledge your newfound right to be legally inferior to 
it. nor is there any debate on the subject - unless, of course, you'd 
like to pledge allegiance to the emperor. the normans responded to this 
by expanding their rule in central italy. 
while humphrey was conquering the center of the peninsula, robert 
guiscard was conquering the south of it. when he shifts the narrative to
 the first of the two main characters of the text, malaterra brings out a
 truth that may have been lost up to that point - with all the conflict 
occurring between princes and churches, the italian masses may very well
 have met the normans as liberators (which is something they had no 
intent of being). when they rounded up the tax collectors and the 
wealthiest citizens for torture and plunder, they may very well have 
been cheered on. in the long run, however, the italian normans proved to
 be cruel and unpopular leaders that were constantly putting down 
revolts. 
so, a conflict appears to be brewing between humphrey and guiscard.
 if one happened, the text is silent about it - guiscard is said to have
 been elected leader after humphrey died of an illness. see the pages on
 
tancred d'hauteville and 
robert guiscard. the second main character that appears is 
roger of sicily,
 initially in an antagonistic role against guiscard, who was probably 
not actually his brother. malaterra spins a tale about roger being upset
 that he wasn't being taken seriously, but this isn't worth 
deconstructing. rather, questions about the nature of humphrey's death 
are relevant in the context of roger's alliance with geoffrey in their 
apparent resistance to his rule, as are questions about both the nature 
of the succession and the extent of guiscard's functional rule. guiscard
 put down several revolts of various character, often with the aid of 
roger. 
in any case, roger and guiscard then unite in an uneasy alliance to
 finish the conquest of southern italy (apulia and calabria) from the 
byzantines, which led to guiscard accepting the title of duke from the 
pope. interestingly, sicily (then occupied by arabs) was in the area 
that guiscard was made duke over. what that actually means is that 
guiscard was given the pope's blessing to invade and conquer the island.
 this allowed him to eventually (the chronology is disputed) appoint 
roger as count of sicily. 
so, we see that the conquests of these norman warlords consistently 
brought regions that were then lost to the papal sphere back into it. 
this would continue into the crusades. while the chroniclers want to 
present these norman warlords as independent agents, they seem to have 
been highly manipulated as mercenaries within a three-way (muslim, 
papal, byzantine) struggle for control of the mediterranean and to have 
ultimately largely been proxies of the pope. malaterra is careful to 
point out that the justification for the invasion of sicily was 
religious, but this is probably only a half-truth. on that note, the 
high number of norman warriors that were involved in the crusades is 
worth pointing out. were the crusades partially a pro-active way for the
 pope to rid himself of these barbarians, while trying to reclaim lost 
lands in the process?
leading up to the invasion, there was further conflict between 
roger and robert. malaterra again spins a story that isn't worth 
deconstructing, but the crux of the problem seemed to be about primacy 
and roger seems to have been the more popular ruler, despite the 
church's apparent preference for guiscard (at least at this point). an 
agreement was reached that gave roger more control over calabria, which 
gave him a safe base to leave his family and to attack sicily from. by 
appointing roger count of sicily, however, guiscard may have actually 
been trying to eliminate a challenger to his own power by sending him 
overseas. this reading is complicated by the alliance between the two 
men, which led to the need for roger to continually come back to the 
mainland to aid robert in putting down revolts. further, robert seems to
 have accompanied roger on some of the missions in sicily. due to the 
inefficacy of his brother's rule, roger wasn't able to complete the 
conquest of sicily until after his death in 1085.
guiscard even went so far as to launch a failed invasion of greece,
 with the aim of seizing the imperial throne. guiscard had "betrothed" 
his daughter to marry the son of the emperor but the emperor was deposed
 before the marriage took place, thereby taking guiscard out of the line
 of succession, which was no doubt the purpose of the whole arrangement.
 so, again, personal ambition aligns with papal ambition. the story 
states that guiscard was winning in greece (and that the war was lost by
 his soon-to-be disowned son, bohemund) until he had to go back to italy
 to save the pope from an attack by the german emperor, but the 
causality in that story is no doubt simplified to present guiscard in a 
heroic light. rather, guiscard probably abandoned a lesser battle over 
the title of eastern emperor for a shot at the greater title of western 
emperor. note that he also had to suppress a revolt by jordan of aversa,
 who had aligned with the emperor. malaterra immediately follows this 
with a story of revolt by roger's son, also named jordan, that seems 
more like a biblical parable than real history. the moral of the story 
is to obey your elders (or have your eyes gouged out with rusty spears).
 were there really two jordans that revolted almost simultaneously or is
 malaterra quietly suggesting that they're the same story? jordan did 
not live long enough to really distinguish.
the text finishes with a further description of further squabbles 
that don't strike me as all that important. if i revisit this in the 
future, i'll update. at this moment, i'm actually not very 
interested....
overall, this text functions as a church-sponsored founder myth for
 the italo-norman kingdom that pulled the south of the peninsula firmly 
into rome's permanent sphere (in inherited form) and lasted right up 
until the unification of italy. the idea of a "hauteville family" is 
probably an elaborate fiction. several dozen random, roving pirates 
fighting for control and plunder were packaged to the citizenry as a 
divinely inspired aristocracy fighting for it's inheritance to uphold 
the honour of the church. as it is primarily papal propaganda designed 
to uphold what would eventually become a feudal aristocracy, it can only
 be read highly critically. these people were probably not religious at 
all, unless it suited them politically. generally, however, it did suit 
them to align with the roman church. that's the key idea to pull out of 
it: there was a very strong alliance between norman pirates and the 
roman church to forcefully eliminate arab and byzantine influence in 
southern italy and realign the area into a papal vassal state.
full text:
http://www.medievalsicily.com/Docs/03_Norman_Conquest/Malaterra%20all%20text%20revised.pdf
http://dghjdfsghkrdghdgja.appspot.com/categories/books/congress/DG/867.24.M3513/index.html