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The Priority of Locomotion in Aristotle’s Physics
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types of change, but not vice versa1: since every change in the cosmos depends on this first eternal change, while it itself does not presuppose the occurrence of any other change, there is an asymmetric relation of ontologi- cal dependency between this primary change of place and all other kinds. And this, in addition to what was presented in the first two arguments, is another sense in which locomotion has ontological priority. Accordingly, the argument implies that whenever there is any change, one needs to pre- suppose the occurrence of locomotion, while there being locomotion in no way entails the occurrence of some other change. The way in which the argument is presented, however, is not straightfor- ward and at first glance it is not easy to distinguish the different steps that Aristotle makes from one to another in his argumentation. The passage begins by stating one of the two main premises of the argument, namely that “change must exist continuously”. What Aristotle certainly means by this is that change must exist without intermittence, that is, it must be eter- nal.2 This clearly is a reference to the claim for which Aristotle argued in the first two chapters of Book VIII of the Physics. There it was shown that if there is change in the cosmos in the way we observe it, then change has always existed and will always exist, i.e., is eternal.3 The first of the two main premises on which the third argument for the priority of locomotion relies then is that change exists eternally. As I will show, Aristotle rightly assumes that the everlasting change clearly needs to be one single change and cannot be a composite of more or less independent changes, since it is directly caused by the first unmoved mover, which is characterised as caus- ing a change that is one in a special sense and eternal. This is where loco- motion comes into play, for, as Aristotle claims in the second main premise of the argument, this eternal change “can be no other [change] than loco- motion.”4 From these two premises Aristotle then draws the conclusion that locomotion must therefore be primary.5 Consequently, in this argument locomotion’s primacy, contrary to what one might think at first glance, does not derive from the fact that locomotion alone can be the one eternal change that is caused directly by the first unmoved mover, but according to 1 A more general definition of ontological priority, as I shall show later on, will be that x is prior to y in this way, if and only if there is y there also must be x, but not vice versa. See 5.4.1 for more on this. 2 This also seems to be what most of the commentators think. See Philoponus, In Phys. 8, 897, 17–18, Simplicius, In Phys. 8, 1269, 17–18, Aquinas, In Phys., L. VIII, l.XIV, 1091, and Wagner (1967), 689. 3 See for instance Phys. VIII 1, 252b5–6. 4 ταύτην οὐδεμίαν ἄλλην οἷόν τε εἶναι ἀλλ᾽ ἢ φοράν, Phys. VIII 7, 260b25. 5 ἀνάγκη τὴν φορὰν εἶναι πρώτην. Phys. VIII 7, 260b25–26: “locomotion must be pri- mary.” 116 All changes depend on the first locomotion, but not vice versa ISBN Print: 9783525253069 — ISBN E-Book: 9783647253060 © 2014, Vandenhoeck & Ruprecht GmbH & Co. KG, Göttingen
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The Priority of Locomotion in Aristotle’s Physics
Title
The Priority of Locomotion in Aristotle’s Physics
Author
Sebastian Odzuck
Editor
Dorothea Frede
Gisela Striker
Publisher
Vandenhoeck & Ruprecht GmbH & Co
Date
2014
Language
English
License
CC BY-NC-ND 4.0
ISBN
9783647253060
Size
15.5 x 23.2 cm
Pages
238
Categories
Geisteswissenschaften
Naturwissenschaften Physik

Table of contents

  1. Acknowledgements 9
  2. 1. Introduction 10
  3. 2. The importance of the primary kind of change 14
    1. 2.1 Overview 14
    2. 2.2 The arrangement of the Physics 15
      1. 2.2.1 First option: Books VI–VIII as the treatise On Change 18
        1. 2.2.1.1 Andronicus 19
        2. 2.2.1.2 Theophrastus’ letter 19
        3. 2.2.1.3 References in Aristotle 21
        4. 2.2.1.4 Eudemus 21
      2. 2.2.2 Second option: Books V–VIII as the treatise On Change 22
    3. 2.3 The eight books of the Physics 25
      1. 2.3.1 Physics I–IV: Examining change for the sake of understanding nature 25
      2. 2.3.2 Physics V–VIII: The general analysis of change 27
    4. 2.4 Physics VIII 31
      1. 2.4.1 Overview 31
      2. 2.4.2 The argument of Physics VIII 31
      3. 2.4.3 The importance of the primary kind of change 34
    5. 2.5 Conclusion 40
  4. 3. Change in quality and quantity of living beings depends on loco-motion, but not vice versa 42
    1. 3.1 Overview 42
    2. 3.2 Growth and diminution presuppose alteration 44
      1. 3.2.1 Growth presupposes alteration 45
      2. 3.2.2 Diminution presupposes alteration 48
    3. 3.3 Alteration presupposes locomotion 49
    4. 3.4 Does locomotion precede all occurrences of change in quantity? 53
    5. 3.5 The reason for the restriction of the argument’s scope 58
    6. 3.6 The sense of priority 67
    7. 3.7 Conclusion 69
  5. 4. Locomotion necessarily accompanies each of the other kinds of change, but not vice versa 71
    1. 4.1 Overview 71
    2. 4.2 What changes in quantity changes with respect to place 73
      1. 4.2.1 Overview 73
      2. 4.2.2 What is growing moves to a larger place 74
      3. 4.2.3 Change in place implies no change in the spatial order of the subject’s parts 78
      4. 4.2.4 A possible objection 81
      5. 4.2.5 Compatibility with the irreducibility of the kinds of change 85
      6. 4.2.6 Conclusion 88
    3. 4.3 What undergoes generation or corruption changes with respect to place 89
      1. 4.3.1 Overview 89
      2. 4.3.2 Generation and corruption in virtue of aggregation and segregation 90
      3. 4.3.3 What aggregates or segregates must change with respect to place 96
      4. 4.3.4 Conclusion 97
    4. 4.4 What changes in quality changes with respect to place 98
      1. 4.4.1 Overview 98
      2. 4.4.2 What does it mean that condensation and rarefaction are principles of quality? 100
      3. 4.4.3 Every alteration involves a change in the four basic qualities 104
      4. 4.4.4 Every change in the four basic qualities involves con- densation or rarefaction 108
      5. 4.4.5 Condensation and rarefaction are forms of aggregation and segregation 110
      6. 4.4.6 What changes in quality changes with respect to place 112
      7. 4.4.7 Conclusion 113
    5. 4.5 Conclusion 113
  6. 5. All changes depend on the first locomotion, but not vice versa 115
    1. 5.1 Overview 115
    2. 5.2 The unity of the eternal change 118
      1. 5.2.1 Two ways in which change may be eternal 118
      2. 5.2.2 Why the eternal change must be one and continuous 121
      3. 5.2.3 The criteria for being one continuous change 123
      4. 5.2.4 What is better is the case in nature 127
    3. 5.3 Locomotion alone can be one and eternal 130
      1. 5.3.1 None of the other three kinds of change can be one and eternal 131
      2. 5.3.2 Only circular locomotion can be one and eternal 134
    4. 5.4 Locomotion has ontological priority 137
      1. 5.4.1 Ontological priority 137
      2. 5.4.2 A third sense in which locomotion is ontologically prior 139
    5. 5.5 Conclusion 142
  7. 6. Locomotion has temporal priority 144
    1. 6.1 Overview 144
    2. 6.2 Locomotion has priority in time, since it is the only change eternals can undergo 146
    3. 6.3 Objection: Locomotion is the last of all changes in perishable things 148
    4. 6.4 Coming to be presupposes an earlier locomotion 150
    5. 6.5 The locomotion of the sun as a cause of generation 154
    6. 6.6 Conclusion 162
  8. 7. Locomotion is prior in essence 164
    1. 7.1 Locomotion is prior in essence, since it is last in coming to be 164
      1. 7.1.1 Overview 164
      2. 7.1.2 The reversed priority claim 166
      3. 7.1.3 A different use of the term ‘locomotion’ 172
      4. 7.1.4 Does locomotion come to things last? 175
        1. 7.1.4.1 Capacities of the soul 176
        2. 7.1.4.2 Priority in essence of the locomotive capacity 179
      5. 7.1.5 Another sense of priority in essence 182
      6. 7.1.6 Conclusion 184
    2. 7.2 Locomotion alone preserves its subject’s essence 186
      1. 7.2.1 Overview 186
      2. 7.2.2 Locomotion does not change its subject’s being 188
      3. 7.2.3 Locomotion preserves its subject’s essence best 190
      4. 7.2.4 Making x depart from its essence by being part of a change in essence? 195
        1. 7.2.4.1 Alteration as part of a change in essence 195
        2. 7.2.4.2 Growth and diminution as part of change in essence 199
        3. 7.2.4.3 Locomotion as a part of a change in essence? 201
      5. 7.2.5 Change in quality or quantity in principle may result in a change in essence 202
    3. 7.3 Conclusion: Locomotion’s priority in essence 207
  9. 8. Conclusion 211
  10. Bibliography 220
  11. List of Abbreviations 223
  12. Index Locorum 221
  13. Index Nominum 223
  14. Index Rerum 221
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