Dwarves were also admitted for the first time.*
It's been downhill ever since.
Accordingly, the Sacred Congregation of the Council, in a Plenary Session held on December 16,1905, submitted this matter to a very careful study, and after sedulously examining the reasons adduced on either side, determined and declared as follows:
1. Frequent and daily Communion, as a practice most earnestly desired by Christ our Lord and by the Catholic Church, should be open to all the faithful, of whatever rank and condition of life; so that no one who is in the state of grace, and who approaches the Holy Table with a right and devout intention (recta piaque mente) can be prohibited therefrom.
2. A right intention consists in this: that he who approaches the Holy Table should do so, not out of routine, or vain glory, or human respect, but that he wish to please God, to be more closely united with Him by charity, and to have recourse to this divine remedy for his weakness and defects.
3. Although it is especially fitting that those who receive Communion frequently or daily should be free from venial sins, at least from such as are fully deliberate, and from any affection thereto, nevertheless, it is sufficient that they be free from mortal sin, with the purpose of never sinning in the future; and if they have this sincere purpose, it is impossible by that daily communicants should gradually free themselves even from venial sins, and from all affection thereto.
4. Since, however, the Sacraments of the New Law, though they produce their effectex opere operato, nevertheless, produce a great effect in proportion as the dispositions of the recipient are better, therefore, one should take care that Holy Communion be preceded by careful preparation, and followed by an appropriate thanksgiving, according to each one's strength, circumstances and duties.
5. That the practice of frequent and daily Communion may be carried out with greater prudence and more fruitful merit, the confessor's advice should be asked. Confessors, however, must take care not to dissuade anyone from frequent or daily Communion, provided he is found to be in a state of grace and approaches with a right intention.
6. But since it is plain that by the frequent or daily reception of the Holy Eucharist union with Christ is strengthened, the spiritual life more abundantly sustained, the soul more richly endowed with virtues, and the pledge of everlasting happiness more securely bestowed on the recipient, therefore, parish priests, confessors and preachers, according to the approved teaching of the Roman Catechism should exhort the faithful frequently and with great zeal to this devout and salutary practice.
7. Frequent and daily Communion is to be promoted especially in religious Institutes of all kinds; with regard to which, however, the Decree Quemadmodum issued on December 17, 1890, by the Sacred Congregation of Bishops and Regulars, is to remain in force. It is to be promoted especially in ecclesiastical seminaries, where students are preparing for the service of the altar; as also in all Christian establishments which in any way provide for the care of the young (ephebeis).
8. In the case of religious Institutes, whether of solemn or simple vows, in whose rules, or constitutions, or calendars, Communion is assigned to certain fixed days, such regulations are to be considered as directive and not preceptive. The prescribed number of Communions should be regarded as a minimum but not a limit to the devotion of the religious. Therefore, access to the Eucharistic Table, whether it be rather frequently or daily, must always be freely open to them according to the norms above laid down in this Decree.
Furthermore, in order that all religious of both sexes may clearly understand the prescriptions of this Decree, the Superior of each house will provide that it be read in community, in the vernacular, every year within the octave of the Feast of Corpus Christi.
9. Finally, after the publication of this Decree, all ecclesiastical writers are to cease from contentious controversy concerning the dispositions requisite for frequent and daily Communion. - Source
He started it.
*Dwarves were a race in Middle-earth also called Khazad, the Naugrim, meaning Stunted People, and Gonnhirrim, meaning Masters of Stone. Before Pius X, they were neither recognized nor permitted to receive the sacraments. This may account for the expectation many have today of recognizing the existence of, and allowing alien families to receive the sacraments. Many have complained the church will not even accept that they exist, which is especially hurtful to victims of alien abduction who have born alien children.