English is undoubtedly the only dominant global scientific language in the world today. The dominant opinions attribute its emergence to political, economic, technological and cultural causes, through the influences of the British Empire and the United States.
However, from the point of view of our previous articles, our argument is straightforward: readability  It’s the cause. The evolutionary story was addressed in my article “Visual evolution of written language towards the Latin alphabet: a hypothesis”. The effects of writing on the world were discussed in “Effects of written language on the non-textual world.” . We now explicitly discuss this topic to correct misconceptions and affirm our argument that it can be used to explain history and present societies, and to predict the future.
1. “Being fit to read” is the cause
We should treat writing as a tool, just like other tools, like a pen. One pen is better than another not because the person using it has better writing skills, although they will probably choose a better pen. Likewise, a writing system is better not because its people are more powerful. The writing is useful because it is organized evenly. The readability of the layout certainly influences its usefulness. Different writing systems have different levels of readability. When other conditions are the same, people prefer to read / write legibly.  texts to illegible. Legibility (reading ability) is the rudimentary criterion according to which people choose a writing system from existing ones or develop new systems.
Letters, words, and sentences are visually refined by millions of people. The visual refinement of written English is unmatched by other systems. This allows for the vast publications and diffusion of the English writing system, maximizing the visual and textual information established. Readable systems attract more people to help expand it. Although Mandarin and Spanish have more native speakers than English, their diffusion is limited because the most advanced knowledge, which is the reason for learning the language, is written in English. With an aptitude for reading, writing in English is relatively steady and reasonable. Its speakers are adamant about it, influencing people from unreadable systems. When two or more writing systems meet, each absorbs vocabulary, grammar, etc. of others. to grow themselves. The English turned out to be stronger in this regard.
Of course, readability is not the only reason a writing system spreads. Official status, number of existing users, available publications, etc. all influence the momentum of propagation. But readability is the ultimate cause, either due to the voluntary adoption of readable systems or because readable systems are hardened to dominate unreadable ones. Unreadable systems will evolve in a readable direction or be replaced by readable systems, which could initially be smaller.
2.1. Non-linguistic influences or non-textual causes
This view attributes causes to external factors rather than language itself, for example political, economic, technological, and cultural causes. These factors empower people, whose languages they will master accordingly. People from less advanced societies would be forced to learn voluntarily or would be forced to learn the languages of more advanced societies. To the extreme, illiterate people will delete all texts if they are powerful enough. Generally, this view would consider that advanced societies need readable systems, but not necessarily.
We argue that the readability factor is ultimate and deterministic. We consider texts as the center of the world created by humans. Legible texts establish advanced societies, which can be deduced from The Paper. In other words, social progress is built on a specific writing system, which spreads with their societies and people. Political, economic and other situations can fluctuate for months or even years. An unreadable writing system may temporarily prevail. In the long run, readable systems would build advanced societies and dominate the illegible.
2.2. The spoken form is the main form of language.
This point of view diverts people’s attention from the written form. Many people focus on spoken forms when comparing two languages, marginalizing writing, or without even beginning to think about the effects of the visual aspect of writing. They certainly can’t get into the heart of the problem, not to mention finding solutions. Sound rendering is an important disguise for script readability. The truth is that the spread and mastery of spoken English is due to the success of English texts. The course of English globalization is the governance of speech through the written text.
2.3. Simple spelling contributes to the spread of English
Many people know that English spelling is simple, so it is easy to learn and use, which contributes to the spread of English. This opinion begins to look at the written form. However, simple spelling is generally considered a trivial factor. Also, your opinion assumes that spoken English is paramount, which spelling represents.
In short, the root causes of misunderstanding are not realizing that the written form is the primary form of language and that the written language is the central cause of social progress.
3. Writing systems based on the Latin alphabet, English and other systems
Like English, the historical domains of Latin, Spanish, German, and French were all due to the Latin alphabet, although their spoken forms distinguish them as different languages. The final contribution of the Latin alphabet is neglected. But these systems are not as refined at the basic unit level as English. Using diacritics, ligatures, and extra letters can make writing worse for reading. Complex spelling and sound correspondences and spelling irregularities also give English the flexibility to achieve readability and facilitate vocabulary growth.
It is important to compare systems based on the Latin alphabet with other systems, because the distinctions between systems based on the Latin alphabet are relatively small, which obscures the importance of the readability factor. Compared to other scripts, the letters of the Latin script, particularly the lowercase ones, are better shaped with clarity, simplicity, and differentiation between letters. Latin letters also form syllables, words legibly. The prevalence of romanization indicates the high readability of the Latin alphabet, often under the guise of spelling to represent sounds from the languages of non-Latin scripts.
4. The future
English is likely to continue to grow and evolve based on the current alphabet, vocabulary, and grammar. It will accelerate its spread during globalization and the media revolution. It will be enriched with regional, Creole and Pidgin lexicon, dialects and varieties. Sadly, more writing systems and languages could be disappearing. But the destiny of written language is to regulate, organize and maximize the capacity of the mind, support larger societies, and encode the world. Diversity is not the goal of written language. Many writing systems will be preserved or even grow, at least in the near future. With diversity preserved, a dominant writing system will be the foundation of humanity’s common minds and societies, governing other systems.
 Here “readability” and “readability” have the same meaning.
 Hereinafter referred to as The Paper.
 Here, “readable” and “illegible” are relative terms.