The capacity to raise the state's revenue: tax policy capability and the administration that collects, from registration and filing through compliance, enforcement and the taxation of the cross-border economy under the emerging global minimum settlement.
The Capability Development Index tracks the events that move a capability — operational use, technical breakthroughs, procurement decisions and the industrial base behind them — and places each on the record with the date it happened.
Recent developments cover the current period. Historical developments are the inflection points that produced Revenue Mobilisation & Tax Administration as it stands today.
In the First Dynasty of the Old Kingdom, the Egyptian state levied forced labour from peasants too poor to pay otherwise and collected tithes in kind. Records describe the Pharaoh conducting a biennial tour of the kingdom to gather these dues. This is the earliest documented revenue administration, establishing assessment and collection as a function of the state.
Surviving fiscal records from Europe date back at least to this period, though comparison with economic output is hampered by missing production figures. Taxation as a share of final goods production may have reached 15–20% in France, the Netherlands and Scandinavia. This marks the emergence of recognisably documented state revenue systems.
The parliamentarian John Pym devised a scheme of revenue and taxation that was approved by the Long Parliament. Excise duties on goods became a durable instrument of indirect taxation. The measure broadened the English state's revenue base beyond land and customs.
During the war-filled years of the eighteenth and early nineteenth centuries, governments became more centralised and more adept at gathering taxes, with the sharpest increase in England. Effective rates were higher in Britain than in pre-revolutionary France, though mostly levied on international trade. In France lower taxes fell on landowners and internal trade, generating far more resentment.
The fiscal pressure of war with France prompted the first British income tax. It shifted revenue mobilisation towards direct taxation of individual earnings. The instrument became a model for modern state revenue systems.
Pigou's book argued that taxes could be used to price activities imposing costs on others. The device came to be known as the Pigovian tax. It gave tax policy an explicit regulatory as well as revenue-raising rationale.
Rothbard contended that no one is morally required to answer the state's questions truthfully, including on income tax returns. The work became a reference point for libertarian tax resistance arguments. It framed a durable ideological challenge to compliance-based revenue administration.
Successive increases in exemptions held income tax yield flat relative to the economy from this point. The case illustrates how policy design rather than administrative capacity can cap revenue mobilisation. It is cited as evidence against broad exemption regimes.
On average, resource-rich states made the most progress in revenue mobilisation over this period, rising from about 10% in the mid-1990s. The gain reflected both commodity receipts and improving collection. It marked the largest measured improvement among developing-country groups.
While overall tax revenues remained broadly constant, trade taxes declined as a proportion of total revenues. Revenue shares moved towards domestically levied sales taxes on goods and services. The shift required states to build domestic indirect tax administration in place of customs collection.
The review synthesised evidence on attitudes towards taxation across studies. It concluded that willingness to accept taxes depends on what the revenue is for. The finding bears on the design of compliance and consent strategies.