As more of the world's nations turn to democracy, interest in alternative constitutional forms and arrangements has expanded well beyond academic circles. In countries as dissimilar as Chile, South Korea, Brazil, Turkey, and Argentina, policymakers and constitutional experts have vigorously debated the relative merits of different types of democratic regimes. Some countries, like Sri Lanka, have switched from parliamentary to presidential constitutions. On the other hand, Latin Americans in particular have found themselves greatly impressed by the successful transition from authoritarianism to democracy that occurred in the 1970s in Spain, a transition to which the parliamentary form of government chosen by that country greatly contributed.
Nor is the Spanish case the only one in which parliamentarism has given evidence of its worth. Indeed, the vast majority of the stable democracies in the world today are parliamentary regimes, where executive power is generated by legislative majorities and depends on such majorities for survival.
By contrast, the only presidential democracy with a long history of [End Page 51] constitutional continuity is the United States. The constitutions of Finland and France are hybrids rather than true presidential systems, and in the case of the French Fifth Republic, the jury is still out. Aside from the United States, only Chile has managed a century and a half of relatively undisturbed constitutional continuity under presidential government-but Chilean democracy broke down in the 1970s.
Parliamentary regimes, of course, can also be unstable, especially under conditions of bitter ethnic conflict, as recent African history attests. Yet the experiences of India and of some English-speaking countries in the Caribbean show that even in greatly divided societies, periodic parliamentary crises need not turn into full-blown regime crises and that the ousting of a prime minister and cabinet need not spell the end of democracy itself.
The burden of this essay is that the superior historical performance of parliamentary democracies is no accident. A careful comparison of parliamentarism as such with presidentialism as such leads to the conclusion that, on balance, the former is more conducive to stable democracy than the latter. This conclusion applies especially to nations with deep political cleavages and numerous political parties; for such countries, parliamentarism generally offers a better hope of preserving democracy.
Parliamentary vs. Presidential Systems
A parliamentary regime in the strict sense is one in which the only democratically legitimate institution is parliament; in such a regime, the government's authority is completely dependent upon parliamentary confidence. Although the growing personalization of party leadership in some parliamentary regimes has made prime ministers seem more and more like presidents, it remains true that barring dissolution of parliament and a call for new elections, premiers cannot appeal directly to the people over the heads of their representatives. Parliamentary systems may include presidents who are elected by direct popular vote, but they usually lack the ability to compete seriously for power with the prime minister.
In presidential systems an executive with considerable constitutional powers-generally including full control of the composition of the cabinet and administration-is directly elected by the people for a fixed term and is independent of parliamentary votes of confidence. He is not only the holder of executive power but also the symbolic head of state and can be removed between elections only by the drastic step of impeachment. In practice, as the history of the United States shows, presidential systems may be more or less dependent on the cooperation of the legislature; the balance between executive and legislative power in such systems can thus vary considerably. [End Page 52]
Two things about presidential government stand out. The first is the president's strong claim to democratic, even plebiscitarian, legitimacy; the second is his fixed term in office. Both of these statements stand in need of qualification. Some presidents gain office with a smaller proportion of the popular vote than many premiers who head minority cabinets, although voters may see the latter as more weakly legitimated. To mention just one example, Salvador Allende's election as president of Chile in 197-he had a 36.2-percent plurality obtained by a heterogeneous coalition-certainly put him in a position very...