Actually that it's not true. Absolute poverty better global numbers are due mainly to China. A little also to India. For the rest, it could be argue that they are equal or, in some cases worst.
You could argue that China have benefited from globalization, and, in a way is true. Except that their strategy is almost the opposite of the strategy recommended by the champions of globalization (IMF, etc..)
While the proportion of people living in poverty may have been getting lower, the absolute number of people living in poverty has never been higher.
3 billion people live in poverty. This is the same as the total global population in 1960.
https://www.dosomething.org/us/facts/11-facts-about-global-p...
A condition characterised by severe deprivation of basic human needs, including food, safe drinking water, sanitation facilities, health, shelter, education and information. It depends not only on income but also on access to services.
The percentage of people at this level has been falling for a long time and is now less than 10% of the global population, nowhere near 3 billion.
15% worldwide live on less than 1.25 a day. So again, comparing America's poor with the world is like night and day.