"...OECD Family Database was developed to provide cross-national indicators on family outcomes and family policies across the OECD countries, its enhanced engagement partners and EU member states."
Reminder: Not all countries are OECD countries
"Contains the electronic versions of 80 books previously published in hard copy as part of the Country Studies Series by the Federal Research Division. Intended for a general audience, books in the series present a description and analysis of the historical setting and the social, economic, political, and national security systems and institutions of select countries throughout the world. " Good source for historical context (most books were written 1900-1999 but there are some written 2000-2020)
"The World Factbook provides basic intelligence on the history, people, government, economy, energy, geography, environment, communications, transportation, military, terrorism, and transnational issues for 266 world entities."
Finding Information About Young Adults in Other Countries