This repository is a curated collection of all-cause mortality data from 128 countries and territories, spanning 2015–2024, with additional local and preliminary mortality datasets. It is primarily a data asset rather than a software project: the core deliverable is the `world_mortality.csv` file, which aggregates weekly, monthly, or quarterly death counts from official sources such as the Human Mortality Database (STMF), Eurostat, and various national statistical offices. The READMEs provide exhaustive documentation of data sources, transformation notes (e.g., corrections for delayed registration, unknown-month distribution), and methodological caveats. No executable scripts (e.g., R or Python) are present in the provided file tree, meaning the ETL pipeline is not included in this repository. The data supports excess mortality analysis, notably the companion repository `dkobak/excess-mortality`. The project is actively maintained with recent commits and community engagement, but the lack of dependency management, environment definitions, and automated reproducibility infrastructure limits its reusability for other analysts.