To begin with, the major argument why people believe in the modern dependence of humankind is an ever-increasing rate of globalization.
Try to express your ideas with better clarity avoid being verbose. Clarity is number one priority in essays and it has much more value than displaying your vocabulary knowledge.
To begin with, the major argument why people believe in the modern dependence of humankind is an ever-increasing rate of globalization. As long as costumers opt for international items, they have been forced to depend on alternative countries' supplies. A perfect example of this would be the cinema industry, where people around the globe have anticipated the Hollywood productions.
In addition, the emerging of the Internet and allied connection devices has enabled people in one country work on international corporations in another. These devices have certainly put mankind in dependent position in term of the global employment. Hence, the dependence of people on each other can be clearly seen, as they expedite the level of globalization between cultures through contemporary devices.
... You do not have to give too many examples to support one reason. Instead have one specific example and elaborate on that.