From a helpful history of the estate tax from the IRS, here (emphases added), which is unaware of the significant federal revenue contributed by alcohol taxes (between 30 and 40 percent):
The War Revenue Act of 1898
Throughout the last half of the 19th century, the industrial revolution brought about profound changes in the U.S. economy. Industry replaced agriculture as the primary source of wealth and political power in the United States. Tariffs and real estate taxes had traditionally been the primary sources of Federal revenue, both of which fell disproportionately on farmers, leaving the wealth of industrialists relatively untouched. Many social reformers advocated taxes on the wealthy as a way of forcing the wealthy to pay their fair share, while opponents argued that such taxes would destroy incentives to accumulate wealth and stunt the growth of capital markets.
Against this backdrop, a Federal legacy tax was proposed in 1898 as a means to raise revenue for the Spanish-American War. Unlike the two previous Federal death taxes levied in times of war, the 1898 tax proposal provoked heated debate. Despite strong opposition, the legacy tax was made law. Although called a legacy tax, it was a duty on the estate itself, not on its beneficiaries, and served as a precursor to the present Federal estate tax. Tax rates ranged from 0.75 percent to 15 percent, depending both on the size of the estate and on the relationship of a legatee to the decedent. Only personal property was subject to taxation. A $10,000 exemption was provided to exclude small estates from the tax; bequests to the surviving spouse also were excluded. In 1901, certain gifts were exempted from tax, including gifts to charitable, religious, literary, and educational organizations and gifts to organizations dedicated to the encouragement of the arts and the prevention of cruelty to children. The end of the Spanish-American War came in 1902, and the tax was repealed later that year. Although short-lived, the tax raised about $14.1 million. [About 2.5 percent of the federal budget].
