What is external change drivers?

Example: In 2022, a senior content strategist's entire workflow schema — research, outline, draft, edit, publish — assumed 4-6 hours per article. By mid-2023, generative AI compressed the draft phase to minutes. The old schema didn't just become inefficient; it became a liability. Colleagues using updated schemas produced three times the output. The external force (AI) didn't ask permission. It simply made the existing schema non-viable.

This concept is part of Schema Evolution in the How to Think curriculum, which builds the epistemic infrastructure for schema evolution.