His book [The Ultimate Resource]?, later reissued as [The Ultimate Resource 2]?, is a massive assault on the conventional wisdom of population growth and resource consumption. In it, Simon challenged the neo-Malthusian notion that an increase in population has negative economic consequences, that population is a drain on natural resources, and that we stand at risk of running out of resources through over-consumption.
Simon was also the first to suggest that airlines should provide rewards for travelers to give up their seats on overbooked airlines rather than arbitrarily keep certain passangers off the plane.
Julian Simon and Paul Ehrlich entered into a famous wager, betting on a mutually agreed upon metric of resource scarcity. Simon won the bet.
Simon was an omnivorous reader, and took some steps toward writing a memoir. But he died too young, at 66.
Many of the writings of Julian Simon are available online at: http://www.inform.umd.edu/EdRes/Colleges/BMGT/.Faculty/JSimon/