"what do you suggest happened 30-40 years ago that triggered this massive spread of wealth, then?" Look at GDP or poverty rate of any country, there is no 'bum

"what do you suggest happened 30-40 years ago that triggered this massive spread of wealth, then?" Look at GDP or poverty rate of any country, there is no 'bump' or infection point the year or even the decade internet was invented. You know what did create a bump? Decolonisation. Conclusion: nothing happened, extreme poverty was receding for decades prior, and it's just the same trend continuing.