This is my list of the most evil countries ever, headed by the Ted Bundy/Jeffrey Dahmer amongst nations, an insidious nation whose propaganda (broadcasting service, tabloid press etc) has hundreds of millions around the world in it's grip.
1.Britain
1. Britain committed genocide across continents (which it tries its best to suppress/whitewash/downplay and worst of them all, completely deny). It committed genocides in Asia (esp. in the Indian subcontinent)/Australia/North America/Africa/Ireland (right from the days of Cromwell). "Oh, oh, but the Spanish, the Americans etc etc", yeah, well, that sadly doesn't take diminish Britain's crimes against humanity across continents.
2. Decimation of wildlife across continents (for example, India had approx. 40000 tigers in 1900 A.D; by the time the'shikaar'-loving British sahibs left, it was around 4000).
3. Introduced Biological warfare in modern era.
4. Was one of the first to set up concentration camps.
5. Takes credit for 'banning' slavery (after having profited from it for well over 200 years); by the way, they 'banned' slavery when it was no longer profitable and when it made more sense to continue with slavery in another name i.e. Indentured Labour (their treatment of the Chagossians TODAY shows their mentality).
6. Implemented divide-and-rule policies (often giving minorities rule over the majorities, as minorities are probably less likely to revolt and more easier to control).
7. Displaced entire peoples at gunpoint (settling their own Anglo-Sax Prod people there). Plus the Opium Wars. Also, read about the Plantations.
8. Divided lands according to their whims and fancy (some border disputes last to this day).
9. Looted some of their colonies dry, for close to 200 years (their railways were to transfer the loot back to Britain). Plus many more, including collusion with loyalist terrorists and secret killings (Northern Ireland), torture/castrations/genocide of hundreds of thousands of suspected rebels (Africa; by the way, that was AFTER WW2 ENDED), illegal invasions (2003), bombings of Libya 2011, and Syria 2014 (amazingly, in support of the 'rebels', i.e. the terrorists) and currently helping Saudi Arabia bomb/starve (a tried-and-tested tactic of Britain, as it saves ammunition) the poorest Arab country Yemen. Their establishment (their govt., their historians, the BBC) are really good at whitewashing/covering up crimes (from destroying incriminating documents to protecting the pedophile known as Jimmy Savile). In fact, their historians have one primary job: absolve Britain of it's countless crimes against humanity. WHAT'S EQUALLY BAD ARE THE COUNTLESS SHAMELESS BRITISH EMPIRE APOLOGISTS (i.e. APOLOGISTS FOR MASS-MURDER).
2.Mongol Empire
They killed millions across Eurasia 4-5 centuries (that's 400-500 years) before the genocidal British started murdering millions on an industrial scale across continents.
3.Nazi Germany
The Holocaust (which almost everyone knows*).
*although there are lots of deniers, thankfully not as much as the British Empire apologists
4.Spanish Empire
Again, another empire that murdered millions but at least there are still mestizos (the murderous British Empire didn't even leave any survivors in many cases)
5.Japanese Empire
Nanjing massacre, Unit 731 (gruesome)
6.Ottoman Empire
Amongst countless crimes against humanity in the Balkans, the Armenian genocide (which modern day Turkey refuses to acknowledge, perhaps taking a hint from the masters of perfidy==Britain)
7.Belgian Empire
King Leopold's Congo genocide
8.Timurid Empire
Countless massacred by Timur's forces.
9.Delhi Sultanate
One of the most brutal empires ever (millions of Hindus/other non-Muslims massacred).
10.French Empire
Their actions after the WW2 had ended in Indo-China and Algeria is what condemns them most.