Achievement Mankind Quotes

2 Achievement Mankind quotes by 2 unique authors

• Periods of tranquillity are seldom prolific of creative achievement. Mankind has to be stirred up. — George Santayana
• Periods of tranquility are seldom prolific of creative achievement. Mankind has to be stirred up. — Alfred North Whitehead

Who Wrote These Achievement Mankind Quotes

2 authors contributed a total of 2 Achievement Mankind Quotes as follows:

• 1 Achievement Mankind Quote by George Santayana
• 1 Achievement Mankind Quote by Alfred North Whitehead