Which humanitarian movement did the following quote come from: ""you can not play normal sport in an abnormal society""?

Question

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The quote "you can not play normal sport in an abnormal society" is from the Anti-Apartheid movement. This statement was made to urge international athletes and sports teams to boycott South Africa during its apartheid era, as participating in sports with South Africa was seen as tacit approval of its discriminatory policies.

Which Humanitarian Movement Did the Following Quote Come From: ""You