Because capitalism at its core is all about moving capital to places where more capital can be extracted, it relies on constant growth and finding new ways to extract value from labor. Capitalism used to be relegated to parts of Europe and the Americas but it is now in every corner of the world which means that with open trade you have to be able to be or compete with the most exploitive companies on earth. It will take a majority of people on earth being able to take control of their own labor to be able to escape the reaches of capitalist overlords. https://www.youtube.com/playlist?list=PLGiXIytFn57NoAUYlzU1ByI83slXwvS5b