table: 1-11256021-1
columns: Date, Founder, Extroversion Scales, People-task orientation scale, Introverted, Task-Oriented, Extroverted, Task-Oriented, Extroverted, Relationship-Oriented, Introverted, Relationship Oriented, Moderate
Q:  who is the founder where date is c. 1900
A: SELECT Founder FROM 1-11256021-1 WHERE Date = 'c. 1900'