What is the most significant discovery in the history of mankind?

[KansDem]

92. Agriculture

Moving form "hunters/gatherers" to "planters & harvesters."

If I recall correctly, although this evolved globally, it started primarily in the Nile Valley long before the Greco-Roman period.

Some aspects --
1. Creation of calendar. (Gotta know when the Nile flooded so you can plant accordingly). With the calendar, time is measured and human endeavor becomes measured by time.
2. Food production is "organized." Certain practices and procedures occurring at certain times removed "randomness" from acquiring food. Human endeavors take on more importance since we no longer need to spend our time running around looking for food.
3. Development of city/states--led to "civilization." This is significant as those families who lived closest to water sources were more successful at agriculture than those families who lived furthest away. Consequently, when the "furthest-away" families failed, they went to work for the successful families. That led to the creation of cities (and government) with a ruling class and and working class (or "kings" and "serfs&quot .

Since then, we've had the "industrial revolution" and the "information revolution." However, agriculture remains the most important: we can live without cars and computers but we can't live without food.