Do you see more darkness or light in the history of physics in the 20th Century?

Do you see more darkness or light in the history of physics in the 20th Century? In 500 words or less, use the materials available below to explain your answer.
WATCH: https://youtu.be/FNbhfKeOO5k
LECTURE: https://cdnapisec.kaltura.com/index.php/extwidget/preview/partner_id/898511/uiconf_id/27473392/entry_id/0_bi7xr83p/embed/dynamic
READ: https://history.aip.org/exhibits/einstein/essay.htm

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