Christianity, Hinduism, and Buddhism started depicting deities in human form around the same time.

Evidence

Is it more than an extraordinary coincidence that at about the same moment Christianity, Hinduism and Buddhism first start showing Christ, Hindu gods and the Buddha in human form? — Neil MacGregor, A History of the World in 100 Objects, 658

Categorization

• XREF: The convergence of the three religions at this moment could connect to broader patterns in history. — connects to: Unrelated peoples independently invent similar founding epics — , A Year of World Stories, 15261
• SEED: This observation might prompt further investigation into the significance of artistic conventions in religious expression.
• corroborated: 2 independent passages support this claim — Neil MacGregor, A History of the World in 100 Objects, 658