Linked from
The 16 pages that link to Double-entry bookkeeping, each with the reason it gives.
Balance of paymentsRelated: Its paired entries explain why the accounts balance in principle.
AccountingRelated: Its balancing entries underpin most modern financial accounting.
General ledgerRelated: It keeps the ledger’s total debits equal to its total credits.
Accounting equationRelated: Its paired entries keep assets equal to liabilities plus equity.
Financial transactionRelated: Its paired entries preserve the accounting balance when value moves.