Meanings of low buffoonery in English

But with the Romans the theatre lost its dignity, and was degraded to low buffoonery, indecencies the most repulsive, and to gaudy spectacles.

His book is a thorough mixture of high enthusiasm and low buffoonery, and the Millennium is a fundamental article of his creed.]

The comick dialogue is very sprightly, with less mixture of low buffoonery than in some other plays; and the graver part is elegant and harmonious.

But it is low buffoonery, or silly accidents, that always excite laughter; and that is what people of sense and breeding should show themselves above.

What succeeded these low buffooneries?