The literacy bonus reduces the cost of technology by 20%. The only method of obtaining this bonus is researching the Philosophy technology.

The game will round tech prices up if the discount leaves the value on a decimal.

The following text will be displayed at the bottom of the research screen once Philosophy has been researched:

Literacy reduces the price of all technologies by 20%!

Burn Forest, Clear Forest, Destroy, Disband, Grow Forest, Literacy Bonus, New Horizons