What was the dominant thinking in economics before keynes?

i. All the labourers who are ready to work will find employment

ii. All the labourers who are ready to work will not find employment

iii. All the factories will be working at their full capacity

iv. All the factories will not be working at their full capacity

i,iii

Dominant thinking in economics before Keynes was that all the labourers who are ready to work will find employment and all the factories will be working at their full capacity.