Kia Rae talks about the origin of yoga, why it is popular in America and why it remains popular today. 

https://www.medicalnewstoday.com/articles/286745

https://www.history.com/news/yoga-vivekananda-america#:~:text=It%20was%20during%20the%201920s,but%20largely%20by%20Indian%20immigrants.

https://yogainternational.com/article/view/why-we-practice-a-short-history-of-yoga-in-the-west