I think the Imperium definitely existed as a concept at the same time as Traveller's rules were coming together. It may not have sprung fully formed from Marc's head, but I do think it was a tandem development.
Dislike of the 3I and 1977 purity does seem to be popular at the moment, and that's fine if it makes people happy. But I think even in LBB 1-3, you can already see the Imperium between the lines.
Since I'm one of the people pushing for the enjoyment to be had from playing Traveller with the original rules, I feel compelled to reply to these statements.
First, here's
an interview that took place with Marc Miller on forum. In the interview Miller says the following:
Remember that the original concept for Traveller was very GURPS-ish: a generic system that could emulate every possible part of SF. And in the first year, we did very little support beyond the basic rules. It was only after we started writing adventures that the Imperium started taking shape as a real background.
Make of that what you will. But all the digging I've done suggests that, in fact, the Imperium as a setting for Traveller came after the creation of the rules -- as Miller explicitly states above.
Second, I don't see anyone -- ever -- speaking about any sort of "purity" about the 1977 rules -- or any edition. (The only people who ever reference "purity" are the people talking about what other people are doing. Which should probably give everyone pause for a moment.) As I've said countless times I use the 1981 rules found in LBBs 1-3 as my base, and then add in things I think work better for the kind of game I want from the 1977 rules and
The Traveller Book. If there's any "purity" going on I'm not aware of it.
Third, the reason I go back to the rules form 1977 and 1981 touches precisely on the first point: several of the implied setting details found in the 1977 and 1981 rules specifically contradict the tone and the feel of what would become the Third Imperium. That is, one needs to alter the rules from the 1977 edition drastically if one is going to produce the Third Imperium, and alter them slightly less drastically from the 1981 rules.
This means that if one likes the implied setting details of the 1977 and 1981 editions of the game then the Third Imperium isn't a good fit because you can't make the Third Imperium from LBBs 1-3.
Thus, the point is, it really isn't a matter of "disliking" the Third Imperium but wanting
something else. Is that really so hard to understand? It isn't about being
against something. It is about being drawn to setting that isn't what the Third Imperium is.
Now obviously this is not that big a deal. I'll go off and have fun with my friends and you'll go off any have fun with your friends and whatever happens at our respective tables really can't bother the other.
But here is the clear and obvious point:
If one reads the actual text from the LBBS (specifically the 1981 books weighted toward the 1977 books) one finds a certain implied setting details. And for some of us that implied setting was
awesome. It was free-wheeling, violent, full of off the beaten path worlds full of adventure, sparse government control, and plenty of room for travellers to find their way. By contrast, by the time 1981 rolls around, the Spinward Marches were full of megacorporation, bloodless bureaucrats, Imperial Red Zones that
literally prevent adventurers from getting to worlds of adventure, and fleets that literally dwarf any ship the PCs might be crewing as a minnow stands in relation to a school of sharks.
That the Third Imperium got built out as a setting and people love it is awesome. That the promise of the kind of environment promised in Books 1-3 was lost while making the Third Imperium seems, at least to some of us, a shame.
Further, as the copy on the back of the boxes of the original rules state clearly (and Miller makes clear as well in the quote above), the purpose of the game is for the Referee to build an SF setting full of SF inspirations he can't wait to share with his players. This is why a solid chunk of Book 3 is devoted to
making a setting. It is also why
Book 0: An Introduction Traveller (1981) spends a significant amount of time discussing making a setting. Because the Little Black Books are there for the Referee to make the setting he wants to make.
Now, let me be clear: The Third Imperium is there, "and that's fine if it makes people happy." But some of us want something different when it comes to setting. In fact, some of us wants many different settings... settings as varied and exotic as our individual imaginations will allow.
Further: there is nothing "new" about this. Visit other sites that talk about Traveller and you'll find plenty of people who have been using the Traveller rules for years for setting that explicitly have nothing to do with the Third Imperium or GDW's OTU. Which means the folks playing the game are using as it is was designed to be used in the original rules. There's no honor or prize in this or anything. It's simply a fact -- some people want to play this way, and they do.
But again, luckily, what one person wants to do at a gaming table has no influence on what happens at another gaming table... so we're all good.