Key forks like Bitcoin Cash and Bitcoin SV were born from deep philosophical divides within the Bitcoin community, particularly concerning block size, decentralization, and the original vision of Satoshi Nakamoto. Bitcoin Core emphasized decentralization by keeping the 1MB block size, while Bitcoin Cash advocated for larger blocks to increase transaction capacity. Bitcoin SV further split from Bitcoin Cash, aiming to restore what its proponents considered Satoshi's original vision with significantly larger block sizes.