improvableness

Men have not been optimists in the matter of the improvableness of humanity.

Imperialism 1906

But the thoughts of men have widened with the process of the suns, and they have found that there are developments in other races than the Greeks, in which men will show an improvableness that proves that God's ways in endowing men have been higher than their ways.

Imperialism 1906

Materialistic solutions in the science of man, humanitarian ends in legislation, naturalism in art, active faith in the improvableness of institutions -- all these are once more the marks of speculation and the guiding ideas of practical energy.

Diderot and the Encyclopædists (Vol 1 of 2) John Morley 1880

Before we proceed to the direct subject of the present enquiry, it may not be improper to resume the subject of human improvableness, and consider it in a somewhat greater detail.

Enquiry Concerning Political Justice 1796

Materialistic solutions in the science of man, humanitarian ends in legislation, naturalism in art, active faith in the improvableness of institutions ” all these are once more the marks of speculation and the guiding ideas of practical energy.

Diderot and the Encyclopaedists Morley, John, 1838-1923 1905