HAD to Be Sharp

""God made Arrakis to train the Faithful.""

- The Wisdom of Muad'Dib, Dune

If your means are limited, you have to show resourcefulness. This is especially true if the environment one works and lives within is unforgiving and dangerous. Simply surviving in places like a Death World can make people stronger and tougher, and those who live in such places can be expected to be more than a match for those who don't have to spend every day simply fighting to stay alive. If the world is dangerous enough and generations of people have survived in such a place, natural selection ensures that the toughest and most resourceful will live through, and over time those who live in this environment will change to adapt.

Enter this trope, which deals with people, whether individuals, societies, or entire species, that are meaner, tougher, stronger, and/or smarter than others because their home is the kind of place that breeds out those not fit to survive. Often the cause for a proud warrior race/species. If this is applied to humanity it might imply that Humans Are Warriors. When this is created artificially it is The Spartan Way.

People Who Have To Be Sharp:

 * Barbarian Tribe
 * Disaster Scavengers
 * Father Neptune
 * Intrepid Merchant
 * Mother Russia Makes You Strong
 * Old Soldier
 * Proud Warrior Race
 * Humans Are Warriors
 * Space Cossacks

Reasons Why You Have To Be Sharp:

 * Crapsack World
 * Death World
 * Earth Is a Battlefield
 * Everything Is Trying to Kill You
 * War Is Hell
 * World of Badass

Things To Do When You Are Sharp:

 * Blood Knight
 * Did You Just Punch Out Cthulhu
 * Glory Seeker
 * Knight Errant
 * Plunder
 * The Quest
 * Take Over the World
 * The Conqueror

"Dimo: Haff all dose guys vit de baron gone soft over de years -- or haff ve become... sharper because ve leave de group und haff to tink better?"
 * Benefactors by Rudyard Kipling.
 * Girl Genius Jägers. They are super soldiers who like to kick ass, laugh loudly and drink, not necessarily in this order -- no one expects a Jägerkin to notice everything and get non-obvious conclusions. But then there are those who wandered for many years on their own both in lands where the people remembers them as ex-conquerors and in wastelands where they are not nearly the toughest creatures...

"For decades they said about Kovir that its only riches are sand and seawater. This joke was still remembered when Kovir de-facto monopolized the world market of glass and salt."
 * Mass Effect: This is krogan evolution in a nutshell; their planet was so dangerous that for centuries, the most common cause of death was 'eaten by predator'. This explains why they have secondary and even tertiary organs, and why they are Explosive Breeders.
 * The Witcher:


 * Scrooge McDuck is made of this trope.
 * Every time you see a Death World in Dungeons and Dragons you can bet there are someone really tough and probably really smart.
 * Spelljammer got Scro. Orcs and other goblinoids in the First Unhuman War were cornered and pushed back by elves until they ended up in a barren Death World. When they finally emerged... uh oh. They see common orcs as backward louts for a reason.
 * Dark Sun. All of it. Even cities.
 * Underdark inhabitants in Forgotten Realms. The world below the world is full of creatures incredibly tough just because the Death World requires this... which in turn frequently contributes to the Death World's nastiness. While the Drow prefer cheapskate solutions, they are still packed with magic to the eartips and are highly lethal whether they fight with blades or brains (their cities are about as dangerous as the wild caverns around). And the Swirfneblin are barely comparable with surface gnomes (except tinkers, who are just that crazy).
 * Regional Feats introduced in Forgotten Realms 3 ed. reflect this. Those who live in the jungles learn to survive in the wild, people raised in The Magocracy tend to know how to talk their way around problems and have an eye for magic stuff, and so on.
 * The Drow in Eberron are possibly the toughest humanoid inhabitants of the setting, since they live in the jungles of Xen'Drik and have to tangle with giants for resources regularly.
 * Friedrich Nietzsche with his "What doesn't kill you only makes you stronger." Which is subverted in both real life and fiction as often as not.
 * Actually, what Nietzsche meant was that you can learn from what does not kill you, making you stronger. Which is not subverted as much as people seem to think it is.
 * And also that loss, in itself, can also serve as a source of strength. A person who loses a leg won't be winning any footraces, but according to Nietzsche will acquire a greater firmness of character and spirit as a result of the loss.
 * Proverbs. "Necessity is the mother of invention". Or an old Russian variant, "the need will force you to eat pies" (instead of plain rye bread, that is).
 * Ernest Rutherford said "We don't have the money, so we have to think."
 * The beginnings of physics saw a lot of creativity funnelled into making tools and experimental devices in a barn -- sometimes literally. The early scientists used to improvise in experiments simply because there were no established methods in their area. Even Lord Rayleigh made his own equipment out of near-junk, despite being a lord in his land -- and many, many others. On the way they made a lot of great inventions. Robert Williams Wood was not only the Patron Saint of Education Through Pyrotechnics but, as one of the pioneers of physical optics, made state-of-the-art spectroscopes using materials like sewer pipes or a tombstone, and cleaned one of these by shoving a cat into the pipe and closing it so that the cat had to exit from the other end. Oh, and among other things he was a co-inventor of film animation and cartoon as we know these (you might call him the grandfather of Mickey Mouse), color photography and ultrasonic echolocation.
 * This trope is the reason why, in Warhammer 40,000, one of the acceptable tariffs the Imperium of Mankind imposes on entire planetary governments is... Manpower. Living in a Death World tends to create the sort of humans perfect for cannon fodder in a galaxy where there is only war.
 * Fenris is an ice planet whose ecosystem seems to have been designed by a Norse Mythology buff, inhabited by continually warring pseudo-Vikings. And if that weren't enough the Space Wolves only recruit young warriors who fall in glorious battle.
 * Catachan is a jungle where Everything Is Trying To Kill You.
 * Atilla is pretty much a planet-sized Mongol steppe, as is Chogris, the home of the White Scars.
 * Cadia is a nice, earth-like planet. Oh, and has the Eye of Terror for a neighbor, just a spit away.
 * The majority of Imperial Guard regiments actually come from Hive Worlds. Most often underhive gangs are simply rounded up, given a flak jacket and lasrifle, than dropped onto the front lines with no additional training. In many cases, they don't need it.
 * Dune: Everyone is scared into obedience by the Emperor's Sardaukar, recruited on a prison planet and trained into elite troops. Then they are thrown against Fremen, natives of Arrakis who had just enough industry to stay alive. The results are highly demoralizing. Fremen, upon being informed whom they faced, comment along the line of "ah, we wondered why these were challenging..."
 * Aiel in The Wheel of Time are a desert-dwelling Proud Warrior Race known and feared everywhere for being extreme badasses: in the years prior to the start of the books, a coalition of all the western countries was needed to stop them, and actually failed (the Aiel returned to the desert only when they did what they had set out to). It is also implied that this was their destiny, and that they had been sent to live in the desert, 3000 years before, precisely so that they would become a reliable and powerful army for the Dragon Reborn when the time came.
 * The War Against the Chtorr. Chtorran fauna and flora is naturally more aggressive and adaptive than its human equivalent; scientists speculate that Chtorr is a Death World where all life has to be either aggressive or lunch.
 * In Discworld, this trope is used to justify Instant Messenger Pigeon - Ankh Morpork rooftops are full of gargoiles, so the local pigeons have to be smarter than average
 * This is the background of the Barbarian class in Diablo. Though they specifically reject technology and magic because they think it will make them weaker in the long run.
 * In the Co Dominium universe the second most feared troops in the galaxy (after the Super Soldiers of Sauron) are from Frystaat. A high gravity world with intense heat, blinding sunlight, and lethal wildlife.

Truth in Television

 * Eighteenth and nineteenth century regimes much preferred mercenaries from extremely nasty wilderness areas. A large part of this was based on this theory.
 * Greek philosophers bragged that Greeks were this because of having to tend farms on their own. Persians were stereotyped as soft and wussy.
 * Venetians and Dutchmen spent generations not only living from the ocean and fighting off all competitors but actually living on the ocean(by way of building "fortifications" against flooding). The result was that Venice managed to take over the Mediterranean for a time. And Dutchmen for a short time managed to Take Over the World.
 * It is sometimes said that carnivores are unusually intelligent among mammals because they have to catch their food, and sometimes, fight over it among each other. While grass eaters just bow their head and eat.
 * It's animals that have to use their brains (memory/lateral thinking/both) to get their sustenance (food/water/both), not just their senses (hunting requires sight, tracking scent).
 * By the above theory, the ideal place for intellect to grow is in the middle of the food chain, where creatures both have to hunt for their food and have to avoid other predators. Add to that that these creatures are often not that much stronger than their prey (think wolf vs. wild buffalo), and so have to resort to teamwork and tactics to get their meal. Now guess where early humans stood.
 * Mongols. Remember those guys who beat the Chinese and chased the Kumans into the Adriatic Sea? Not even distracted much by dealing the same way with several Russian princedoms, Hungary and most of Muslim Middle East alike? This mostly was converted tribal militia without benefits of any non-conventional training methods. Their success stems indeed largely from learning the lessons of the steppes: endurance of great hardship making them tough as nails and good at cooperation, nomadic life made everyone a good rider, hunting and warring in open field gave obvious incentives to develop the best long-range weapons around, territorial clashes of tribes and later a civil war gave them plenty of experience.
 * The one major change Ghenghis Khan did introduce was a total replacement of the former social hierarchy with the united militarized Mongolian nation -- their men no longer paid much attention to clan affiliation, but only achievements and command structure. Subodai, his greatest general, an example of having been a 'commoner' who rose to the top. Between the hero cult on par with Greeks and a chance to beat traditional enemies, they tried to be great warriors pretty hard.
 * Finns, living in the Arctic in some of the most beautiful and most rigorous terrain in the world. It was no accident that the Russians preferred other people to pick on.