No it isnt. Hoover dam is not a city in its own right with cut off communication from NCR city. The Main questline is completely different.It has some common concepts and ideas, but they aren't the same.Pre War USA was degenerate and decadent by Ceasar's standards. Not only are drugs such as Mentants freely available, they're given away as prizes in automated trivia contests, amongst other things.
That is why I said "in one form another". Van Buren was cannibalized by its creators because it was a good idea (Van Buren that is). No it isn't a carbon copy but it is enough of a copy to require honesty.
Mentats, I personally think are pills that help you focus and allows you to focus your mind on something. It was written down as used as recreational drugs for parties and for them giving out prizes to anyone (maybe even kids) I don't think they would be particularly harmful outside of addiction. They probably help you with memory of with forming conclusions and rationalizing things. I would have bet they would have been used for such things as breaking into locked stuff, hacking terminals, playing memory games with friends or studying for a test. Jet and Psycho would have probably been something Caesar would have been against, since they are indeed drugs of the variety we know them. I am not sure about the history of Jet but I know Psycho was a pre-war drug experimented on troops to increase their combat effectiveness. Dangerous indeedAlso Caesar was against Prostituition, I believe pre-war America would be like the 50s, and that Prostituition and people who went to prosttutes were sickos and it was kept back alley.I cannot remember an instance where Enclave supported or used these two things (prosttutes or Drugs) but I have not played the first 2 fallouts so I am ignorant about Pre-war America or Enclave in the west.
The Legions beliefs are just another joke about how horribly misinformed KAI-sar (god that bothers me) is about the ancient world. The ancients were so corrupt and debauched that they destroyed their own culture. Also there is nothing anywhere that said the Enclave weren't debauched. They were already well known to be the very definition of corruption. They were a shadow government dedicated to the protection of capitalism at all costs...not the American vision of a democratic society. They are a "red-scare" joke. To this very day most people even don't know what communism is. People still think it is a form of government when in fact it is the only functional and fair form of economics. The Enclave could also be seen as the American peoples collective fear of losing an all powerful father figure to tell them what to do thereby relieving them of responsibility for their own lives.
The NCR & the Brotherhood are both good guys but are enemies. They are both bad. The NCR is corrupt & are somewhat murderers & you can't reason with the BOS. They want your technology and they'll take it. The only good guys in the Fallout world are the east coast BOS but look what they had to go threw to finally beat the Enclave. Every-time I saw them they were getting trashed by either the mutants or the Enclave. The NCR is in better shape because they charge taxes. Its really hard being purely good in Fallout.
The whole point is that there are seldom black and white moral dilemmas. The BoS was founded on the idea of keeping the technological, social, and philosophical accomplishments of man from vanishing forever. It evolved into a xenophobic sect of techno terrorists. The Legion are representative of one mans ability to sway the conquered to his own corrupt and psychotic politics and therefore has absolutely no redeeming qualities. Seriously...how hard would it be to for a tribe to simply pretend to join the legion and then turn on them in the night while everyone is sleeping. KAI-sar (grrrrrrr) wouldn't last 48 hours, guards or not. Mr. House may not be a great guy but he isn't "evil" just self centered. He really does want to protect his little domain and that kind of includes the people around him. He can't possibly have any human frailties any longer because he no longer has human needs. All human greed and corruption stem from basic instinctive drives, when you remove the need to fulfill the drive you remove the whole idea of corruption. You can't bribe a man who has no need or desire for anything you posses...know what I mean? The NCR is the most confusing of them all. It isn't founded on an evil idea so the organization isn't "bad" in and of itself. It IS expansionist, which I can't even complain about because that is what all new societies do. Individual people (soldiers, politicians, etc.) may be bad but you can't say the same for the NCR as a whole.