The world death rate will rise substantially (in the 1970s, per the surrounding passage) because of famine.

Inaccurate ●●●●●

“At this late date nothing can prevent a substantial increase in the world death rate.”

Said on: 1 May 1968 · Prologue of The Population Bomb (May 1968, first of month used); sentence immediately follows the claim that hundreds of millions will starve in the 1970s, so the 1970s window is taken from that passage.
Source: Doomster Paul Ehrlich Unrepentant · Reason
Should come true: 1970s
How sure they sounded: nothing can prevent (certain)
Categories: Health
Importance: 4 of 5 · A reversal of the global decline in mortality would have major global consequences.

Outcome

Inaccurate

The global crude death rate kept falling, from about 13 per 1,000 in 1965-74 to about 10 per 1,000 in 1985-90, rather than rising substantially.

Evidence:

History