Basically what the title says. I've seen lots of different questions around the Russian succession after Peter the Great died (such as his daughter Anna inheriting, one of his short-lived sons surviving to inherit or his grandson Peter II living longer), but I don't recall anyone asking how a longer-lived Peter the Great would have turned out. After all, Peter was only 52 when he died (still only middle-aged by a lot of European standards, though not by Romanov standards, sense his father and grandfather died in their mid-late 40s). At the very least, I think its believable for him to live to 1730 (putting him at 57-58), with anything afterward meaning he inherited the longevity of his paternal great-grandfather Patriarch Filaret (who was 79 or 80 when he died).
Now, in terms of major effects, I'm a bit unsure. Peter had finished off the Great Northern War in 1721, and had sized a significant amount of territory from Safavid Iran in 1723 (basically all the territories around the Caspian sea, which would fall back to Iran under Nader Shah within 12 years), so I'd guess there would be further focus on administrative and educational reform, possibly something on the nobility or the economic development of the country too. The only potential avenue of expansion I could see is another crack at the Black sea. At the very least, a longer lived Peter the Great would mean consistent policies for the rest of the 1720s (and no start-stop of the Petrine style of government under Peter II and Empress Anna).
Finally, this could mean Peter the Great actually decides on a successor, instead of saying "leave it all to...." and then falling unconscious. While I doubt very seriously it would be Catherine (assuming she doesn't die on schedule), I could potentially see him making Anna his heir (again assuming Anna too doesn't die young). The only other option would be his grandson, the OTL Peter II. Now, for a lot of understandable reasons (aka having his father beaten to death), the Tsar didn't want much to do with his grandson. But his maternal connections (nephew of the Holy Roman Emperor, among other relations) means Peter Alexeievich can't just be ignored. So IDK what the most realistic succession would be. Either way, it could be quite interesting.
Now, in terms of major effects, I'm a bit unsure. Peter had finished off the Great Northern War in 1721, and had sized a significant amount of territory from Safavid Iran in 1723 (basically all the territories around the Caspian sea, which would fall back to Iran under Nader Shah within 12 years), so I'd guess there would be further focus on administrative and educational reform, possibly something on the nobility or the economic development of the country too. The only potential avenue of expansion I could see is another crack at the Black sea. At the very least, a longer lived Peter the Great would mean consistent policies for the rest of the 1720s (and no start-stop of the Petrine style of government under Peter II and Empress Anna).
Finally, this could mean Peter the Great actually decides on a successor, instead of saying "leave it all to...." and then falling unconscious. While I doubt very seriously it would be Catherine (assuming she doesn't die on schedule), I could potentially see him making Anna his heir (again assuming Anna too doesn't die young). The only other option would be his grandson, the OTL Peter II. Now, for a lot of understandable reasons (aka having his father beaten to death), the Tsar didn't want much to do with his grandson. But his maternal connections (nephew of the Holy Roman Emperor, among other relations) means Peter Alexeievich can't just be ignored. So IDK what the most realistic succession would be. Either way, it could be quite interesting.
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