The Metric System
The International System of Units (SI), better known as the metric system, is defined by "world measurement experts" at the BIPM, which is the The International Bureau of Weights and Measures, which is an international organization with legal personality which operates under the direction and supervision of the CIPM, which is the International Committee for Weights and Measures.
They last redefined everything in 2019, so nothing is based from a physical artifact any longer. Now they can redefine how anything is measured whenever they like.
BIPM mission statement, 3rd bullet-
"improving the quality of life and sustaining the global environment."
BIPM objectives-
"develop opportunities for the application of metrology to global challenges"
"capacity building, which aims to achieve a global balance between the metrology capabilities in Member States"
"knowledge transfer, which ensures that our work has the greatest impact"
Pdf files in the founding docs show a lot more detail of where they are involved in social engineering.
https://www.bipm.org/en/
https://www.nist.gov/pml/owm/metric-si/si-units