Could you live eating nothing but peanuts for a really long period of time?

Well, my nephew has lived for the past 6 years on pretty much chicken nuggets and milk alone. And not very much of either too. He's 9.

Relevant: http://www.livescience.com/18161-food.html

"No single vegetable or legume has all nine essential amino acids humans need to build the proteins that make up our muscles [...] At first, without all the right amino acids, your hair starts to lighten in color and your fingernails get soft. Much worse, 'your lean body mass suffers. That doesn't just mean your muscles, but also your heart and your organs.' Eventually, your heart shrinks so much you die; this happens, on occasion, with extreme cases of anorexia nervosa."

Yeah, if I need to.

https://www.youtube.com/watch?v=Xn676-fLq7I&ab_channel=kellyclarksonVEVO

If you don't care about the possibility of cancer and the results of an imbalanced diet, then do it, it's your life. xD

Another question, would that eventually make someone nuts?

Eating nothing but peanuts and drinking water, you could expect scurvy to set in within 6-8 weeks. I would imagine much like eating only rabbit, you would eventually die of malnutrition, say ~6 months or so into it.

As long as I have ketchup with them. Why not.

I'm not sure about peanuts, but I once read about a guy who ate basically nothing but cookies for 25 years and was still fine. Well, not "fine" since it obviously led to health issues, but he didn't die. So I'm inclined to think think that peanuts would be similar in that you can theoretically stay alive with an all-peanut diet, unless there's something fundamentally different about peanuts that makes them dangerous to consume in excess compared to cookies. Anyway, here's an article I found about it (ironically he is a chef):
http://www.dailymail.co.uk/news/article-532150/Chef-fear-food-survived-25-years-eating-biscuits.html

Sure, peanuts have lots of DAMN GAINS BRUH

Probably, but it won't be healthy at all and probably will cause serious illness within weeks (if not earlier). You probably also will drastically lower your life expectancy (is that spelled correctly?).

If you you "found" a truckload of peanuts and think you won the lottery you're unfortunately mistaken.
What you could do is substituting a meal or so per day ... could save you money but probably get allergies
after weeks/months if you eat too much of those per day (esp. if salted) and as Shamrock said that could lead to
cancer as well, but would take years (with way above average peanut consumption) i'd be guessing in my ignorance.

You are going to have a bad time when you go to the toilet, been there done that.

Well, I don't think you would be still healthy by the end of week 1, but maybe you could go on for a while. If you can survive long enough, here's how you would look like eventually:

View attached image.

i'm currently living on popcorn and bread for almost a week. peanuts don't sound so bad. ¯\_(ツ)_/¯

Well, I wouldn't last long since I'm allergic to peanuts, but if you decide to try it out, keep us updated. ^^

Technically yes, but I would die on the first day because of being heavily allergic to peanuts...

if this is some crazy diet i suggest you stay away it doesnt sound healthy at all

No

Yes, but only to an extent. You won't be healthy and will eventually die from poor nutrition.

Once I ate almost an entire can of peanuts at once and for the next 24 hours I burped every couple minutes. Each one tasted like liquid death.

Be careful!

For posterity

Dunno, but even tho I love peanuts I bet my stomach wouldn't like it that much and I'd be dead of indigestion before other causes of dead had the chance to factor in.

You could survive a reasonably long period of time off of peanuts only. How long depends on a few factors, you would have to drink a lot of water, and get a good amount of sun to make the diet last, and you would need a lot of peanuts. Making it into Peanut butter, you would need to eat around 21 tablespoons a day to meet the minimum "healthy" calorie intake. You would get more than enough protein, Vitamin E and B3, copper, and magnesium, but be very lacking in Vitamins A, B1, B2, C, D, and K, which can lead to bad eyesight, scurvy, rickets, lack of blood clotting (important for stopping bleeding), and even internal bleeding. Not to mention Calcium, Iron, and Potassium would be severely lacking, causing a slew of problems, especially to bone strength.

Let's say you used multivitamins, and got a lot of sun, you could become less deficient in those vitamins and minerals. However, You would still be getting less than a third of your carbohydrates, and almost 3 times the amount of fats per 2,000 calories. You'd have heart issues, be more susceptible to cancer, and not be in terribly good shape all around. You'd lower your life span considerably, but you could live a long time.

Tl;Dr,
You could plausibly survive a pretty long time off of just peanuts, even longer with proper sun, water, and multivitamins. But you would have many issues and take a great chunk out of your life expectancy.