The new diasporas as in a demographic sense, when mobility is made increasingly accessable and affordable...(such as people like us when the date of final return seems distant if not forlorn...)

Or diasporas in an economic sense, when economy and international trade exert an overwhelmingly strong force in creating a global market across political boundaries...

Or diasporas in a cultural sense, when a mass material culture monopolize minds and dilute national heritage...(may I use the term "dilute" instead of "replace"...)

or many other influential factors...

（抱歉，写了一天关于朱子的论文，现在大脑的状态已经没法儿再用中文写端正的句子了。。。也没有反驳你的意思，这些是我在读你的文章时脑子里随便冒出来的想法，就写了下来。）