English is already wide spread particularly among rich countries. It was spread through the British Empire and then finalised by the United States as the global language. It is the native language in the USA, Canada, UK, Ireland, Australia, and NZ and many smaller countries. It is common in the Scandinavian countries. All in all there's about 500 million people who are very fluent in it and several hundred million more with some capability. It is the dominate language in aviation, science, economics, diplomacy and many more areas. This is why I think it will be the main language of the future as opposed to other common ones such as Spanish, Mandarin, Hindi or Arabic.
Yes, I think that English should be the global language since it seems to be widely spoken in most countries or at least understood by many in many different countries. English is easy to both read and write which makes it the best language to be put forward to become the global language.
Whatever the world should be, it is what it is, and the fact is that English has already developed as the lingua franca for business and government throughout the world. This is the primary factor that makes it worthwhile as a global language - it is already widely known and used, thus it would take huge resources and in fact likely be impossible to switch which language is used internationally. This reason alone makes it superior to other languages as a global language.
Language is the filter through which we see the world. Foreign languages aren't just another means of communicating, or communicating using different words, it is a different way of thinking. The thought that only your way of thinking can be correct is wrong.(irony) Be open to other peoples ways, have an open mind and an open heart.
All languages are equal because they aren't just the sum of their words. Each language has specific traits that make it inherently unique and give its speakers a different view of the world. NO language is perfect, mind you but each has something to offer that no other can. If we, ( a confusing english word, if you think about it) as a world want a universally understood tongue it should be an easily adaptable to everyone's expectations.