"Did the French revolution change the world in an irreversible way, ie. Was the world after the French revolution significantly changed?"
Along with the American revolution, I'd say yes--I consider the two revolutions two sides of the same Enlightenment coin...and as hesitant as I am to show a bit of overly-patriotic pride, while it doesn't boil down to a right and wrong way to express such feelings, I think most objective observers would prefer a revolution the way we Americans had one over the bloody, terror-laden way the French revolution proceeded.
I actually agree with Hereward to a great degree--
"Both the English Civil War and the American Revolution together set the scene in terms of ideas."
English CW/American Rev/French Rev--Acts 1, 2, and 3 of the same democratic ideal playing out on the stage of the Western world.
I think its changed the West forever; other regions of the world not so much...the Russian Revolution smacks of the French Revolution 2.0 to me (even more extreme, and despite potentially-good ideals and intentions at the beginning it led to even more terror and terrible leaders by the end...I'll take Napoleon emerging from the French Rev over Stalin's eventual arrival any day.)
Asia and much of Africa remains a mess, totalitarian, or both.
South America is...well, just look at Brazil...and the dictator-revolution-new dictator pattern that has characterized much of its history.
And as for the Middle East...well, the Enlightenment had to happen before their ideals could be acted upon in the West...and many Arab nations have actively shunned such an Enlightenment in favor of reaffirming Islamic radicalism.
But yes, in terms of the West, at least, the English, French, and American ideals and revolutions/civil wars have forever changed the way we view government, religion, mankind and the world on the whole.
"Was the French revolution “revolutionary” in ideas and scope, or was it just a cyclical expression of the transition of power in France?"
I think it truly was revolutionary...in its idealism. What actually HAPPENED, on the other hand...that was more cyclical.
"Comparisons between the old France and the new Republic, between Bonaparte and Louis. Was the revolution beneficial to France or detrimental? What about to the rest of the world and Europe?"
For France:
--In the immediate, it was beneficial.
--In the short term, it was a disaster.
--In the intermediate (ie, the Bonaparte years) it was very much peaks and valleys.
--In the long term, it was beneficial...but it also serves as a cautionary tale, both to rulers and would-be revolutionaries alike.
For Europe:
--It led to some great Romantic poetry in English (particularly by Byron and Blake) so I'm counting that as a plus... ;)
--The Leninists seemed to draw from the French Revolution...and while some might count that as a plus, I have to say, it didn't turn out that well at all...
--I think that's the template, really: in terms of ideals, art and poetry it had a positive influence...when people tried to act on those ideals, just like the actual French Revolution, the result was mixed at best, and maybe on the negative side.
I think Napoleon was a better leader than Louis XVI...by virtue of, well, actually BEING a leader...Louis really shouldn't have governed at all, he was forced into it and had no aptitude for statesmanship...and while Napoleon waxed and waned--hey, at least he waxed. (Pun not intended.)
Emancipating Jews from the ghettos (albeit not for the most altruistic of reasons), short-term victories for France, restoring order after The Reign of Terror, The Louisiana Purchase (hey, I'm American, I have to count that as a plus...for us anyway.)
On the flip side, eventually defeated, built up massive debt over the course of his wars, and of course civil liberties weren't exactly always encouraged--then again, given how many heads were being chopped off due to the age-old story of the liberators becoming the tyrants, it's debatable how well those liberties were working out at all--and at least Napoleon put an end to the state of terror and continuous guillotining of people.
I would say that I don't think that Louis and Marie were "bad" rulers in the sense that they weren't malicious, just very negligent, not at all up to the task, and (especially in Marie's case) very naive and with a penchant for doing exactly the wrong things at precisely the wrong time. The two were so sheltered and ill-equipped to rule--not to mention saddled with a heap of problems from the old regime--that they really needed a constitutional monarchy...and the Revolutionaries wanted that at first--but it never materialized. Marie was far too frivolous.
(I get the feeling a lot of right-wingers here in America view Michelle Obama as a Marie Antoinette figure, and while I think that view of Mrs. Obama is wholly justified, it does speak to just how notorious a figure Marie Antoinette has become, both in the public consciousness as well as the unconscious--even those who don't know who Marie Antoinette is can readily identify the archetype of the exorbitant, overly-extravagant queen figure which is largely the product of Marie's legacy and being.)
That being said, she shouldn't have died--it was completely disgraceful for the French to kill her the way they did, storming her bedroom (nearly catching her while she was still in it) and terrorizing her with the heads of friends of hers on pikes they carried before ultimately capturing and executing her. It was completely vindictive and cruel. She held no real power even when Louis was king, and she certainly held none after his fall...there was no reason to murder her like that, especially when she had kids, they could just as easily have just exiled her to some distant country and have been done with her.
So I do have a bit of sympathy for them there, especially Marie; controversial and ugly as it is, at least beheading a king makes a bit of political sense...it happened with Charles I, and it happened with Louis XVI...but there was no reason to behead her, again, especially when she had kids to look after and her only real crime was just being so sheltered and vain that she was a symbol of all the French had come to hate in their rulers.
But treating her as a symbol first and a person second dehumanized her so vulgarly I think it also dehumanized (and to an extent marred the respectability of) the Revolutionaries...it's pretty hard to claim yours is the movement for Liberty and Freedom when yours is also the movement comprised of bloodthirsty mobs and is in the business of murdering mothers out of pure spite.
"1. Was Napoleon a bad dictator? He did afterall invent the Napoleonic code, and made many breakthroughs in civil organisation, as well as invented things like the telegraph."
While I don't know how many dictators can actually be called "good" (especially in the Age of the Enlightenment and after...before that it was all kings and queens of course, with the odd exception of a figure like Cromwell--who turned out to be a dictator, so there we are--so I think we need to evaluate figures like Elizabeth and Caesar by different rules than we do modern dictators) I'd at least argue Napoleon "broke even," as it were, or maybe leaned towards being a good dictator on the whole, given that "good" comes with the caveat that that's on the whole and he still did some rather unsavory things that no modern ruler should do.
"2. Did the British defeat Napoleon? It was in Russia where he lost his Grande Armee."
Much as I don't think the comparison between the two fits nearly as often as people like to try and make it fit...and as afraid as I am of Godwinning the whole thread--
I think in this instance a Hitler comparison IS warranted in that both Russia AND the UK/US/Canda (all the bases covered? No one going to complain I left their nation out?) were primarily responsible for defeating Hitler alike.
The Russian Invasion and Trafalgar/Waterloo are as equal as Stalingrad/The Battle of Britain-to-D-Day in terms of contributing to the downfall of Napoleon/Hitler.