The Age of Imperialism during the 1800s was an era in which several European nations and the United States would establish colonies and overseas territories throughout Africa, Asia, and the Pacific. It was actually a continuation of empire-building and expansion that had been going on ever since Christopher Columbus discovered the Americas in 1492.
Condemned by some leftists as needless conquest, genocide, and forcing Western Civilization onto these regions, the Age of Imperialism instead opened up these regions to the rest of the world by means of trade, infrastructure, and Western intellectualism. In fact, some people say that the world might be better off if the European nations still had their colonies. Why would they say that? In order to answer that question, one must examine some of the countries that had established colonies/territories.
Britain had a vast empire, which included the following nations: Ireland, Gibraltar, Malta, Cyprus, Canada, Belize (formerly known as British Honduras), Jamaica, the Bahamas, Guyana (formerly British Guyana), Australia, New Zealand, India (which also consisted of Pakistan and Bangladesh), Sri Lanka (formerly known as Ceylon), Myanmar (formerly known as Burma), Singapore, Malaysia, Hong Kong, Egypt, Sudan, South Sudan, Kenya, Uganda, Nigeria, Zimbabwe, South Africa, and part of modern-day Somalia. The British even made inroads into Afghanistan. It also consisted of various islands in the Pacific and Atlantic Oceans.
Such empire-building contributed to the end of the African slave trade and purged piracy from the seas. It also led to a crackdown on the practice of sati/suttee (widow burning) in India and honor killings in present-day Pakistan and other colonies. The concept of jihad had practically been wiped out in the colonies where Muslims were the majority. So if Britain still had its vast empire, you wouldn’t have to worry about Al-Qaida, Boko Haram, or other jihadists. Dictatorships would never had been established in places such as Myanmar or Uganda. Nor would have any genocide in the Sudan. Muhammad Aideed would never had been a warlord in Somalia. And if Guyana was still a British colony, one might wonder if Jim Jones would have succeeded in carrying out the Jonestown massacre/mass suicide. In addition, the British Empire helped keep Nazism, Fascism, Communism, and Japanese Militarism at bay.
Similar arguments can be made for France, whose empire included the following nations: Haiti, Morocco, Algeria, Tunisia, Mauritania, Mali, Niger, Chad, Madagascar, Vietnam, Laos, and Cambodia.
If Italy still had Libya as a colony, you would not have to worry about Muammar Gaddafi or the terrorist attack in Benghazi.
If Angola had remained a Portuguese colony, then the civil war there would not have broken out.
You might even be able to argue that if Spain kept its vast empire in the Western Hemisphere, then you would not have to worry about the likes of Fidel Castro, Hugo Chavez, Che Guevara, Manuel Noriega, the Sandinistas, or the drug cartels.
Meanwhile, if the Ottoman Empire still existed, radical Islam would not have emerged there, because the Turks would have cracked down on such activity. Thus, there would have been no Al-Qaeda or ISIS.
As for the United States, it should be noted that the American colonists of the 1700s were not anti-imperialistic, in fact, they had rebelled because they wanted an empire of their own. Had the United States held onto the Philippines, you wouldn’t have to worry about the jihadist activity that has emerged there in recent years.
Thus, in spite of what some people say about imperialism, it is certainly clear that the world would be a better place if the United States, Britain, France, and other nations still had their colonies/territories.
For more information on this subject, check out the following books: The Politically Incorrect Guide to the British Empire by H.W. Crocker III and: The Politically Incorrect Guide to the Middle East: by Martin Sieff.