This article studies the evolution of Swedish inheritance taxation since the late nineteenth century to its abolition in 2004. The contribution of this article is twofold. First, the annual effective inheritance tax rates are computed for different sizes of bequests and asset types, accounting for all relevant exemptions, deductions, and valuation discounts. Second, an attempt is made to explain changes in inheritance taxation over time. Ideology appears to be the main driver of the sharp tax increases of the 1930s to the 1960s. Wartime economies with higher pressures on the people induced politicians to raise inheritance taxes on the wealthy, primarily during the First World War. Increased opportunities for tax planning for the wealthy are also documented, most notably a series of tax cuts on inherited family firms in the 1970s. This rise in avoidance opportunities for the rich, while middle-class heirs faced growing inheritance tax rates, undermined the legitimacy of the tax and led to its repeal.T he evolution of inheritance, gift, and estate taxation across different economic systems engenders important questions regarding the trade off between egalitarian ambitions and incentive effects in the welfare state. Inheritance taxes are among the most direct fiscal instruments for equal opportunity in every new generation. Simultaneously, however, they may dampen incentives to accumulate wealth and induce tax evasion and avoidance behaviours. Ultimately, whether such taxes positively or negatively contribute to societal development over the short and long run thus becomes an empirical question.This study offers two contributions to the literature on inheritance taxation. Most studies of long-run trends in inheritance taxation base their analysis on statutory top marginal tax rates, that is, the highest possible marginal rate paid by heirs regardless of the amount of inheritance required to reach that rate. In contrast, this article presents a new long-run series of effective average inheritance tax rates computed on the basis of the full spectrum of institutional factors affecting the actual final tax payment. Furthermore, these rates are presented for differently sized inheritances, from an average middle-class heir to an extreme upper-class heir, and for different types of inherited assets: family-firm equity and non-firm wealth. Our series are annual, they span from 1885 to 2004, and cover a period