Imagine there are five pages in the folder already — all sealed with a sealing number. What if I go back to the second page and modify a transaction to favor myself? The sealing number will let anyone detect the inconsistency in the transactions, right? What if I go ahead and calculate a new sealing number too for the modified transactions and label the page with that instead?
Today we are close to taking our next step. Our greatest opportunities are now global — like spreading prosperity and freedom, promoting peace and understanding, lifting people out of poverty, and accelerating science. Our greatest challenges also need global responses — like ending terrorism, fighting climate change, and preventing pandemics. Progress now requires humanity coming together not just as cities or nations, but also as a global community.