The Effects of a Global Thermonuclear War

Just what the title says. From the Introduction:

The following is an approximate description of the effects of a global nuclear war. For the purposes of illustration it is assumed that a war resulted in mid-1988 from military conflict between the Warsaw Pact and NATO. This is in some ways a worst-case scenario (total numbers of strategic warheads deployed by the superpowers peaked about this time; the scenario implies a greater level of military readiness; and impact on global climate and crop yields are greatest for a war in August). Some details, such as the time of attack, the events leading to war, and the winds affecting fallout patterns, are only meant to be illustrative. This applies also to the global geopolitical aftermath, which represents the author's efforts at intelligent speculation.

The final death tally passes two billion. Chilling.