They where largely unproductive compared to the last few decades. Source: https://ourworldindata.org/grapher/global-gdp-over-the-long-run https://ourworldindata

They where largely unproductive compared to the last few decades. Source: https://ourworldindata.org/grapher/global-gdp-over-the-long-run https://ourworldindata.org/grapher/global-gdp-over-the-long-...