The Anglo First policies were the set of unofficial and in some colonies official policies which were outlines as more or less racist in the point that all Anglo's and people of British descent were to take priority over the colonial people. This over the years led to Tens of millions of deaths as population displacement and the British military supporting their colonies heavily, directly or indirectly killed by the British. almost 30 to 40 million in China were killed as a direct result of Britain meddling during various disturbances and rebellions most significantly the White Lotus Rebellion which led to Qing China weakening and their loss of Tibet and most of Southern China as various breakoff states from the Qing..
Along side this the indirect result of the policies led to increased and more brutal conflict between the Indian kingdoms, and the Chinese states which led to large scale death and in India prevented them from being prepared by the large scale outbreak of Cholera which by todays standards and research is considered a large scale mutation of the disease which led to nearly another 50 million deaths in India. South Africa was also Adversely affected as it became a major hub of British population which over the years expanded exponentially as British families were able to have nearly 5 kids a piece and in some cases nearly 10 or 15 which led to a large scale population increase of the white demographic in Africa.
Following the end of British Rule in North America and the Spanish failing to maintain their major control over colonial possessions in the Americas the Anglo First policies began to develop as Britain ran the risk of becoming a second rate or failed colonial power. The ended up with the first British colonies in Argentina and the expansion of South Africa which now included Cape colony which was annexed. By this point the colonies in Oceania, Argentina, and South America continues to grow as the British offered subsidies to help bolster the low populations of the colonies. By 1818 the British were back in full swing from their loss of the North American colonies and began to exploit the Failing White lotus rebellion and brought it back in full swing.
Finally in 1823 the British moved in to "quell" the White Lotus Rebellion which they had been secretly supporting and the Chinese genuinely thinking the British were sincere allowed this. However when 2 Qing Armies were destroyed at camp nearly 2 days apart ended up forces the Qing government to sign the Humiliating treaty of Hong Kong which created Kingdom of Tibet, and Republic of South China which was a pro British government and essentially a Protectorate. By 1840 the British had officially disbanded the short lived southern republic and turned China into a colony proper. By this point nearly 300,000 British had settled china and had begun the displacement of Chinese people in the Colonization of China which in Tandem with the Russians acquiring Port Arthur by force, the French destroying the Qing fleet and sharing a trade monopoly with Britain with the Qing, and the very under published British discrimination against the Southern Chinese led to the establishment of Britain's Chinese colonies adding to its empire.
By 1845 the policies had entered everyday language and became known to describe the many thing British did to ensure their people remained pacified but prosperous in their colonies even at the expense of the Natives. This Brutal reputation that British developed eventually thought to bring scorn incidentally brought fear of defying the British and many people simply just tolerated their situation and thought to just stay under the Empires prying eyes.
The Implications of the Anglo-First policies are regarded with disgust throughout British history as a bad part of their own heritage but has allowed them to maintain a large scale international presence as well as a cultural heritage and influence which is spread far and wide across the entire planet, with an estimated above 1 billion people being native English speakers Double the Spanish imperial heritage worldwide.
The major demographic impacts of these policies have left long lasting if not permanent parts in where the major facets of the policies took place. Southern China still remains populated by a large amount of people of British Ancestry, as well as Southern India and the entirety of certain areas like Argentina, New Zealand, Australia, and to a lesser degree New Guinea. All of these areas have a developed Anglo population of over 2 million and in some cases are large scale republics or kingdoms which still take part in Commonwealth of Nations. Examples of these nations would be the Federation of China an Anglo led and increasingly more Anglo populated nation in southern China, New Scotland (Anglo-Argentina) Australia, New Zealand, South Africa, and to an increasing Degree Sri lanka and Southern India which have become large British ancestry population hubs. This has left many major countries as part of the Commonwealth still and has prevented various conflicts. The only notable difference would be the Republic of India. A Nation while extremely nationalistic has led a great deal in social development and allows for the total respect of all of its demographics, and since the Indo-Pakistani war has led the Indian Sub-Continent to a new period of peace and prosperity.