Allspice is just one spice, and not “all spices.” It got its name because allspice resembles three spices—cinnamon, nutmeg and cloves.
   
“Allspice is not all spices at all, but one spice, the product of the powdered berries of the pimento or Jamaica ginger” was printed in The Globe (Toronto, ON) on May 24, 1888. ” Allspice is ‘one’ spice, its name derived from the fact that its fragrance and taste curiously resemble a mixture of all three of its chief rivals: cinnamon, nutmeg and cloves” was written by food writer Clementine Paddleford for This Week magazine on February 14, 1943. “Despite its name, allspice is just one spice. It comes from the pimento tree (not pimiento, the red pepper), and derives the name, allspice, because its flavor suggests a blend of nutmeg, cinnamon and cloves” was printed in the Philadelphia (PA) Tribune on August 19, 1950.
   
“allspice is actually just one spice… the proudest of spices” was posted on Twitter by Mark J Baum on June 15, 2013. “Allspice is the most arrogantly named spice” was posted on Twitter by Catfart.net on July 22, 2013. “Allspice is the most conceited of the seasonings” was posted on Twitter by Rob Vanden Heuvel on March 11, 2016.
 
“Allspice is the most arrogant spice, it’s acts like spices not included in it don’t even exist! I’m for All spices so I’m against #allspice” was posted on Twitter by Danny Lobell on October 22, 2017. “Allspice is the most egotistical name for a seasoning” was posted on Twitter by steezecamp on June 24, 2018. “Allspice is the most arrogant spice” was posted on Reddit—Showerthoughts on September 11, 2020. “Allspice is the cockiest spice….thinking it can replace all the others” was posted on Twitter by John Zimmerman on September 4, 2021.
 
   
Wikipedia: Allspice
Allspice, also known as Jamaica pepper, myrtle pepper, pimenta, or pimento, is the dried unripe berry of Pimenta dioica, a midcanopy tree native to the Greater Antilles, southern Mexico, and Central America, now cultivated in many warm parts of the world. The name “allspice” was coined as early as 1621 by the English, who valued it as a spice that combined the flavours of cinnamon, nutmeg, and clove.
 
24 May 1888, The Globe (Toronto, ON), “Round the Globe,” pg. 6, col. 1:
Allspice is not all spices at all, but one spice, the product of the powdered berries of the pimento or Jamaica ginger.
 
14 February 1943, New York (NY) Herald Tribune “Spice in Your Life: Uncle Sam’s stock of seasonings will keep variety in menus” by Clementine Paddleford, This Week magazine, pg. 39, col. 3:
Pimento, or allspice, is a native American spice that has made good in the face of competition from the East Indies. Allspice is “one” spice, its name derived from the fact that its fragrance and taste curiously resemble a mixture of all three of its chief rivals: cinnamon, nutmeg and cloves.
 
19 August 1950, Philadelphia (PA) Tribune, “MEMO - To Mrs. Housewife” by Anne Goode, pg. 6, col. 6:
Despite its name, allspice is just one spice. It comes from the pimento tree (not pimiento, the red pepper), and derives the name, allspice, because its flavor suggests a blend of nutmeg, cinnamon and cloves.
           
29 August 1952, Chicago (IL) Daily Tribune “Kitchen Pointers” by Mary Meade, pt. 2, pg. 2, col. 2:
Q.—Is allspice the name of one spice or a combination of many?
A.—Allspice is the dried fruit of the West Indian pimento, so-called because its flavor resembles a mixture of other spices, particularly cinnamon, nutmeg, and cloves.
 
1 December 1990, Waterloo Record (Kitchener, ON), “Seasonings add dash to recipes” by Pat Huges and Eleanor Cameron, pg. C4:
In spite of its name, allspice is just one spice - the dried small berry of a West Indian tree. Its flavor resembles a combination of cloves, cinnamon and nutmeg—hence the name, allspice.
 
Google Groups: rec.food.cuisine.jewish 
Rice Kugel
Mimi Hiller
Feb 21, 1998, 3:00:00 AM
(...)
That’s interesting because allspice is actually one spice. The reason it implies more than one is that it tastes like a combination of other spices.
 
Twitter
Double Oh One-Four
@nappyfro
Apparently, Allspice is just one spice.  I never cared, but I’ve heard that twice today.
6:37 PM · Aug 3, 2010·Twitter Web Client
   
Twitter
Dr. H
@enigma731
“Allspice is just one spice. It’s not lots of spices.” Oh, #WorstCooks, I love you.
6:29 PM · Mar 16, 2012·Twitter Web Client
   
Twitter
Dustin Mueller
@DustinMueller1
So allspice is only one spice.. Wth
6:11 PM · Dec 15, 2012·Twitter for iPhone
   
Twitter
Mark J Baum
@MarkJBaum
allspice is actually just one spice… the proudest of spices
2:33 AM · Jun 15, 2013·Twitter Web Client
   
Twitter
malfuf musa
@randullff
No, “allspice” is not “all spices,” its just one spice called “allspice.”
7:21 PM · Jun 22, 2013·Twitter for iPhone
     
Twitter
Catfart.net
@T1M07HY
Allspice is the most arrogantly named spice.
5:51 PM · Jul 22, 2013·Twitter for iPhone
 
Twitter
Will J Grant
@willozap
Allspice is actually just one spice??? I HAVE BEEN LIED TO
6:24 PM · Oct 6, 2013·Tweetbot for iOS
   
Twitter
Oh no! It’s MackJ!
@MackJ
Don’t let the hype fool you: Allspice is just one spice.
3:26 PM · Jan 19, 2014·Twitter for iPhone
   
Twitter
thefoodbee
@thefoodbee
Allspice: All purpose but not all spices: Allspice is just one spice, but it has so many uses. http://bit.ly/1CfjfpX
9:48 AM · Apr 8, 2015·twitterfeed
   
Twitter
Rob Vanden Heuvel
@robvh2
Allspice is the most conceited of the seasonings.
2:27 PM · Mar 11, 2016·Twitter Web Client
 
Reddit—Showerthoughts
Posted by u/cye604 September 26, 2016
“Allspice” does not contain all the spices. In fact, it contains relatively few.
 
Twitter
Chris Espinosa
@cdespinosa
Allspice is, in fact, only one spice.
9:24 PM · Dec 23, 2016·Tweetbot for iΟS
     
Twitter
Mac McKenzie
@pat_4291_mac
That Allspice is the mongrel of the spices. #HowTheOtherSpicesFeel
3:23 PM · Sep 29, 2017·Twitter Web Client
 
Twitter
Danny Lobell
@DanielLobell
Allspice is the most arrogant spice, it’s acts like spices not included in it don’t even exist! I’m for All spices so I’m against #allspice
12:20 PM · Oct 22, 2017·Twitter for iPhone
 
Redit—Showerthoughts
Posted by u/kirklandlakesteve April 18, 2018
Allspice is only one spice
     
Twitter
steezecamp
@steezecamp
Allspice is the most egotistical name for a seasoning
5:52 PM · Jun 24, 2018·Twitter for Android
 
Twitter
ᕕ( ᐛ )ᕗ
@corviiid
also fucked up that allspice is actually only one spice? what’s with that name then asshole? a bit self important aren’t we?
5:45 AM · Aug 11, 2018·Twitter Web Client
   
Twitter
Kate Heartfield
@kateheartfield
Replying to @kateheartfield
“Allspice” is actually just one spice, but 16th century English people thought it sure did taste like a lot of spices.
6:26 PM · Dec 12, 2018·Twitter Web Client
   
Twitter
Jason Mack
@thejasonmack
ALLSPICE IS ONLY ONE SPICE
10:03 PM · Nov 2, 2019·Twitter for Android
   
Twitter
Mou.
@m_ghum
“Allspice” is one spice from african pepper family not a blend of spices.
”البهار الحلو” هو نوع من انواع الفلفل الافريقي وليس مزيج من البهارات المختلفة.
6:16 PM · Aug 15, 2020·Twitter for iPhone
 
Reddit—Showerthoughts
Posted by u/shnigybrendo September 11, 2020
Allspice is the most arrogant spice.
       
Twitter
Adam Sulzdorf-Liszkiewicz
@AdamLiszkiewicz
“Allspice” is one spice called “Allspice”.
6:47 PM · Sep 26, 2020·Twitter for Android
 
Twitter
Haus of Decline
@hausofdecline
Allspice is only ONE spice. I feel like I’m going crazy here.
12:00 PM · Aug 23, 2021·Twitter Web App
 
Twitter
John Zimmerman
@Johnzimbo2
Replying to @chefsymon
Allspice is the cockiest spice….thinking it can replace all the others
4:21 PM · Sep 4, 2021·Twitter Web App